Sure. And 'normal' ELF executables link against libc and will not work if it's missing. If you want to argue quality-of-implementation[0] issues, go right ahead

Sure. And 'normal' ELF executables link against libc and will not work if it's missing. If you want to argue quality-of-implementation[0] issues, go right ahead, but that's not the same problem as requiring code signing/app store. 0: ie, that windows doesn't really support APKs because it doesn't provide the APIs needed for them to work properly