You can disagree all you want but there's no need for additional engineering if people won't do their due diligence in removing the ice near the windows and lubricating their seals. How would you fix it?
If people don't clean the cameras off, how can you fix autopilot?
If people don't keep air in their tires how would you fix that?
...and are your fixes permanent?
You cannot simply keep adding more power to the windows. You also cannot have the window automatically drop lower due to safety regulations.
It's the nature of frameless car doors to act this way during the short-drop. Cars from BMW and Mercedes with similar frameless doors do the same thing. The Internet is littered with examples and fixes.
Owners must lubricate the rubber seals for it to continue to work properly and for it not to freeze up. On the extreme some people cover their door or even just that part of the lower seal overnight.
If you wake up and your car looks like this, then you have other problems to worry about:
15 minutes of preheating is not going to cut it.
Autopilot would also be out of commision, but that wouldn't disqualify it from being self-driving altogether, just not in this situation.