You can spout off "my way or the highway" as long as you think US citizenship is valuable enough that people are going to put up with it. People not expatriating is obviously the desired outcome of those rules, and the alternative is people renouncing their US citizenship (which is becoming more reasonable as the US passport gets weaker, among other factors).

You're missing part of the point, though. Almost no other country in the world has rules like this. The US government provides among the lowest level of services for its citizens out of any first-world government, so there's no reason it needs to be that much more strict. You should be asking why it's necessary if only from a competitive standpoint-- why are other countries able to treat their expats so much more respectfully?