No. “AM causing interference in EVs” would be that you turn on an AM transmitter and the EV motor starts to shutter or loses power. But that is not what we are talking about. It is that you turn the EVs motor on and the AM reception becomes noisy, isn’t it?

It is not about who has been around sooner, or who is more important, but what degrades in the presence of what.

Wrong. If you really want to get pedantic, EM forces affect everything the same way (in line with Newton's third law). So you can have an argument for both sides. But preferring one will always be wrong. Especially if you disregard outcomes that can be felt by humans as you did.

The interference is still coming from the car regardless of which function you think is more important. AM radio waves aren't messing with the car, it's the other way around.