Again, if you do what Hashem wants, you don’t get punished, but if you don’t, then you do. Hashem makes the rules, and He decides who gets punished.
If you listen to Beis Din, you won’t get punished, but if you don’t, you will.
You don’t lose your World-to-Come for embarrassing someone when Hashem says to, and in fact you may lose it if you don’t.
As you already know, the Torah tells us in certain situations that we are required to embarrass others.