The linked message is from 2019, i.e. per-M1 Apple laptops and at a time when arm in datacenter was just starting out.
Tbh, I feel like it’s kinda pointless to discuss a comment made by someone over 4-years ago. Both the environment and the person itself can change a lot in that time.
The easiest way to block an auto-upgrade to Win11 is to just disable TPM in the BIOS. That way Windows will see the PC as not Win11 compatible and not perform the upgrade.