Well, I wouldn't say meaningless but, in the strictest sense, it is rather moot, yes. It's not very easy to try to force someone to change their mind except under rather extreme conditions.

But the whole 'freedom of belief' thing tends to come hand in hand with freedom of expression (of those beliefs), which is much more important and seems to come down to mostly the same thing.

A state that recognises freedom of belief (and free expression thereof) is one that (hopefully) won't make certain viewpoints and ideologies illegal.

Doesn't matter much in regards to individuals interacting mind as the sorts of thing a person could to do to stop a person freely expressing themselves are likely illegal for other reasons anyway. :o)