what NO? It is a must because you do not know that it can be better? How did you live before when cars had Cruise/TACC and it was silent? did you crash all the time, you were not aware you enabled it? WTF.100% no.
I know the article below is not the quite same but the principle is.
In a 10 minute span the autopilot can go on and off several times due to a variety of factors (phantom brake, auto-lane change fail etc etc). I hate the ping and pongs in my Tesla - far too many of them but AP on/off is a must.
now for the constructive stuff.
Firstly - Autopilot has no lane change mechanism. only EAP has it.. that is for starters. So "disable and not aware of it" does not apply.
Secondly, all, (probably all) other manufacturers let driver to enable and disable "Autopilot" feature (what ever you call it Driver assistant, Blue, or whatever) silently - just an indication on hud. like now, AP has it as well - you know, indication on hud.. I had BMW 330e, 69 reg (nice) which had driver assistant which was EVERYTHING EXACTLY THE SAME as Tesla's autopilot, just significantly better - silent enable/disable, auto-resume after lane change, acceleration when overtaking, touch sensitive wheel, auto slow down (GOOD WAY, not too fast, not too late) when approaching roundabouts, etc. I am not talking about some sorcery like auto parking, parking "memory" etc.
Thirdly, There is a HUGE difference between EMERGENCY disabling it for any reason (any issue as you wrote, like phantom breaking (that thing alone SHOUNLD NEVER EVER FoCKIN EXIST, that is the most important)) and when you push the stalk - it is BING BONG, then you change lane it is BING BONG, then you push stalk again - BING BONG. - 3 time in span of 10 s...
only delusional sociopaths like this stupid bing bonging.
but again, all normal sane car manufacturers make it that it resumes AP after lane change, or it accelerates if TACC/AP set speed is higher than the car in front and once you start overtaking, that you know, you did not jump into faster lane at 50 mph when all around you in 70.. - but this is Tesla, where some deluded people still believe that Tesla's systems are the best in the market, when it definitely aren't.