My answer would be "So what" ...
Its $400 off the RRP price, or a $400 price increase that doesn't happen, or $80 profit for Tesla that goes into the stuff that bottom-line pays for.
When I got my first Tesla they whipped a sheet off it, spent an hour or more explaining everything to me one-on-one, and included Swag of a Mug, fancy pen, umbrella, leather cover for the fob, car was fully charged ... and if I had a warranty issue they sent someone out to collect it (with a low loaded if it was undriveable) and the driver collecting it left me their car as a loaner. When I traded it in I, like a complete Muppet, left my house keys in the centre-console. They sent someone to my house to drop them off - nearly a 4 hour round trip.
When I picked up the M3 I got a powerpoint presentation with a bunch of other people and then "Here's your keys off you go". That was fine when I picked up the M3 ... less so when I replaced the MS as it was the same M3 powerpoint
not that, personally, I needed it. When I traded the M3 for the MY no PowerPoint any more. Just a couple of guys at a rickety wooden table in a multi-storey car park handing over keys.
By your reckoning it seems that none of these retrograde steps should have happened. Everyone should have that service ... and the underlying cost baked into the RRP.
I think that Tesla think that if this bothers you then they are happy that you go to a different brand. They aren't going to fit your cherished number plate for you, nor lots of other things that a Dealer most probably would.
What do I think about this?
How flipping much have I paid over the years for someone in a dealership to show me the new car I just bought?
Quality of those individuals varied from Very good to completely indifferent, but I'm absolutely certain I had to pay their wages to do that. Pointless if someone could make a good YouTube instead, then I have the best-of-breed training, not whoever was duty-person on my collection day.
So the Granny Cable is no longer included (maybe Type-2 as well). Do I care. Well I thought I did ... until I thought about it.
Who needs one?
People charging at home using Granny Cable and not a Wall Charger. probably relatively low mileage, or can charge at work and only need to charge at home sometimes. So ... they need to buy one.
When have I needed one?
Almost never. Original Rolec charger broke, and was some weeks to acquire a replacement charger and get it fitted. but 13AMP would have been useless for me. I was doing 30K miles a year back then, so would have had plenty of days when I needed a "decent overnight charge". I had a Commando socket fitted when I had the wall charger installed but whereas the adapter for that was included with granny cable way-back-then it is now only an option. (although as I read it extra connectors will be included in the standard replacement).
If I didn't have one and was in that situation? Not far to town, charging there is crap, but it does exist. There are 4 or 5 people in the village with EVs, I could probably borrow their granny cable (or, better still, their wall charger)
At Rellies; Well, yes, but that's only a "maybe" for me, now. When I first had the car I charged at Rellies. Arrived fairly empty 'coz I knew they didn't mind and would "offer", and I took them a couple of bottles of wine, so we were "evens". It took literally all weekend to charge.
Tripped all their house electrics? Yup, done that.
Socket got so hot we worried about it? Yup, that too.
Rained, had to find a bucket and two bricks to keep it dry? Yup, and that.
Back then finding a Supercharger somewhere near them was very unlikely. Now? Much less unlikely, and probably an alterative like Ionity nearby.
Now? I charge somewhere nearby and arrive with "enough".
If I stop at a hotel I'll scavenge for electricity. Maybe a 13AMP socket in the car park for the pressure washer ... but that's just for my convenience to add some charge whilst I sleep - the antediluvian hotel ought to be providing EV chargers in the car park anyway .. .and if they do? then if they aren't tethered I need a Type-2 cable instead.
So basically I no longer arrive at Rellies needing a 13AMP charge ... but I might if delayed, arriving late, and chose to convert my planned Supercharger Time into contingency and thus arrive less delayed - and probably without the extra bottles of Wine I now need as a thank you for the charge
.
Unexpectedly need the Granny Cable?
I just can't imagine the circumstance where I might be out somewhere and suddenly / unexpectedly need the granny cable. Type=2 - yes, definitely might need that.
Personally: Yes I want one. I value my time, I can afford one, and at some point it might save me some time by giving me "options".
But for everyone, included in the price of the car by default? Now I've given it some thought I can't see any sense in it.
Tesla's approach however, only benefits their bottom line...
I don't understand why that is a problem.