I can see what you mean, but you do have the option to install EGS on your PC, you just choose not to. There was no way to install a separate app store on iOS.
FWIW, I also prefer Steam and dislike needing EGS, but I have the option to install it no problem without being restricted by something like Microsoft when I'm on the Windows platform.
FWIW, I also prefer Steam and dislike needing EGS, but I have the option to install it no problem without being restricted by something like Microsoft when I'm on the Windows platform.