True, but a lot of times those types of decisions are for a specific amount of time. Like, they’ll keep pushing their Surface hardware for a bit, sales will be subpar, and Msft’s engineers will have plenty of time to play around with the M1 hardware. If Parallels will be offering official support (once out of beta/tech preview) for Win10 on ARM, that kinda means to the general public that “Win10 works on the M1 Macs”. As evidenced in the comments from the OP’s post, people clearly don’t understand process. Whether it’s a company of one person making a semi-popular iOS app, or if you’re Microsoft, porting your software to new hardware isn’t always easy.Yes for VM's but not for Bootcamp. But the same goes for Microsoft. So far all I've seen from Microsoft are Apple trashing TV ads in order to sell people off Macs and on to Surface Pros. That coupled with the fact that they still haven't licensed WoA to run on M1 VM's is a very good chance they are making a "Business Decision" not to support Macs, and they have every right to make such a decision.
Things will get better.