Why would you immigrate?
The reason is simple, political reasons.
Mainland China is becoming more and more totalitarian with no end on sight, this bothers me.
And then, some Chinese would brush it off like nothing and tell me, “Why would you even bother with politics? As long as you can live, politics isn’t important.”
It is important, and involving in politics actively in a democracy can subsequently change citizens’ lives, whereas in a totalitarian state it’s impossible.