You seem to be intentionally looking through the wrong end of the telescope to not see what is going on here.Super interesting, but I don’t think stuffing a bunch of expensive charging equipment in every car is a reasonable solution to the very infrequent “worst case” scenario you describe above. Even here in charger-rich CA, I almost never come across public L2 chargers anywhere near 72 or 80A. They’re just not a thing.
We are not asking Tesla to do this in every car, regardless of whether each person needs it. Stop putting words in people's mouths. But the point that several people have been making is that for a significant number of people and locations, this is intensely useful, and Tesla has eliminated it as an option at all and will not offer it for anyone to choose to buy. That is what is frustrating about this. They don't need to build it in every car, but it's still important to offer the option for people who need it.