As said, activating a copy of windows using VL keys for home use is against EULA and technically is piracy.
No, MS won't come after you as an individual, they don't give any shit about home users pirating their software. They can sue large corporates and organization for millions if they get information about them.
To this day you can install windows 7, activate with Daz loader and upgrade to Win10 to get genuine HWID based activation and subsequently upgrade to Win11 for free.
This is the exact methodology which is used by MAS scripts mentioned above. It generates a genuine upgrade "ticket" on a Win10/11 machine and when the machine goes online it gets activated automatically from MS servers.
Once done, you never have to use that script anymore on that machine ever. Clean install windows 10/11 again and machine will be activated when it goes online.
The activation is tied to machine mobo and can be linked to Microsoft account if you sign into one on the machine.
So given the above things there's no sense to pay for keys which are either stolen or not legal to sell.