

Stripped down to the bare essentials, those are similar. But surely you realize, that the sheer amount of content that was added over the years, and the enormous amount of mods, and the entire community, aren’t remotely comparable, right?
This is less of a Photoshop for drawing vs Krita and more of a Photoshop for image editing vs GIMP situation, and even that comparison is kind of unfair to GIMP.





I’ll just assume you’re serious and not trying to be a troll. Those aren’t launchers or different clients for the same game, they are different games. It’s the same as how Tux Cart isn’t compatible with Mario Kart. It’s just not the same thing. You also wouldn’t assume a Teardown mod works in Minecraft, just because both are voxel-based, right?
There are open source Minecraft launchers like Prism, those are cool and useful, and frankly way better than the official one, but they use a Microsoft account too, as your ownership of the game has to be verified, and you can’t connect to servers without one.