I can't speak to the exact mechanics of tame, but I found it useful when I used it. Like a healer having calm so they can cut off the immediate fight.

But I also, I guess, didn't have the expectation that "calm them down for a while" translated to me being able to walk through their territory without any further issue.

I don't think it's 100% useless at all, particularly if you're a beastmaster. But even if not, being able to not immediately fight an aggro creature is decent.

I can't speak to working as intended though, sorry :(.

-Ish