Linux might be the name of the kernel, but we use Linux to refer to the whole ecosystem too. For example, people say "I'm running Linux" when they run e.g. Ubuntu or Debian etc, not when they run Android. Running "Linux" doesn't mean just running the kernel.
And in the MS case, the argument is the opposite: MS calls it a "MS subsystem for Linux" but there's absolutely no Linux kernel code in it. Just emulation of APIs and the GNU userland.
And in the MS case, the argument is the opposite: MS calls it a "MS subsystem for Linux" but there's absolutely no Linux kernel code in it. Just emulation of APIs and the GNU userland.