Indeed it would be.
I think the issue is that one vehicle, the truck, is expected to do multiple things with minimal impact.... and may do the most taxing of those things (towing 3-4X it's own weight), only rarely, in the "average joe" scenario.
So an EV can be engineered to tow well, and be cost effective and efficient when doing so...witness the Tesla Semi. But how many people would buy a semi and only tow with it 3 times a year for trips, and then just use it as a daily driver. That's a lot of battery pack , ~900KWh, going to waste for everyday use.
Similarly, you could design a truck with a 350-400 KW pack that will tow that RV trailer just fine, but man that's overkill for grocery-getting, and there's gonna be some other tradeoffs for a daily driver: weight & space being two biggies.
It is an interesting problem....