I agree with you, i wish that for particular endeavours people would use fullnames rather than stagenames. If it's something you've created entirely yourself - your own album for instance, or a youtube channel - use your stagename.

Cinema is like theatre, which is like writing; use your full names, people!

To answer another commenter's auestion, yes, it annoys me if a moview credits actors as "zendaya" or "rihanna" rather than their full name. This is just ridiculous to do outside of pop music or hip-hop. See it wouldn't be appropriate even for various other genres of music.

I was a bit irked that the video game Dispatch had actors credited as

I guess another reason it irks me is that acting is a personal thing. It works for music because you put on a persona and there are no "credits" at the end of the song; the name helps carry the persona and hence the whole performance. It works less for acting because in the credits we want to know who is behind such a brilliant assumption of a persona. I think the same goes for directing: we want to know the very name of the genius whk poured his creative efforts into the film.