The 3rd party launchers seem to exist mostly for modding. I don’t care about this. I play very infrequently, usually just with my nephews at the point, so I would rather have the simplicity of the 1st party launcher vs trusting a 3rd party and having a bunch of extra bloat I’m never going to use.
All of this is besides the point that Microsoft should have a functional launcher for a game they are charging people money for, that they claim supports Apple Silicon. If 3rd party launchers exist, it’s clearly not a technical issue that can’t be overcome. They just haven’t done it. That’s pretty pathetic considering how big Minecraft is.