This isn't Apple's problem. It is that simple. Microsoft does make a version of Windows for ARM. What Microsoft does with Windows for ARM (whether the do a complete port over to Apple Silicon, whether they run existing X86 (32 bit) or X64 (64 bit) applications, how optimized any or all of this becomes) is up to Microsoft. Apple may try to encourage Windows for ARM/Apple Silicon, or not. I'm inclined to think that Apple doesn't do anything in either direction.
What Parallels, or any other emulator, again it is in the hands of those creating the emulator. Apple certainly won't do it, and as long as the emulator fits within Apple's software guidelines/rules, won't do anything to stop it.
Just because people have chosen to run Windows on the Intel Macs in the past, should not be taken as Apple having given any sense of priority to this aspect of the Intel Macs. This had far more credence 10-12 years ago than it does now. Back then, it was a relative lack of Mac software that may have been the major influence. Today, with the ability to run iOS apps (and yes, I know they are not Mac optimized apps) and its huge base of software, makes running Windows apps less of a priority.