Casting is not inherently bad, it's just that it's often misused as a means to achieve something that really should either not be done at all, or done more elegantly. If it was universally bad, languages would not support it. Like any other language feature, it has its place.

Is being type cast bad?

The Bad News: 1. Typecasting can also break your career. Yes, many actors' careers have been made because they always play a certain character…but if there isn't enough substance to back it up, audiences start to get the déjà vu effect.

Do actors like being typecast?

Being type cast is great for actors because it means that Casting Directors like seeing you play specific character types. ... That's why after awhile most actors will notice they keep being seen for the same character types over and over again: Police Officer, Gay Man, Lawyer/Business Woman, etc.