They’re using the same logic as the “wear a mask even if you’re not sick” people. Because you might accept some malware that would use your PC to spread through the Interwebs.
Even though others who care will have upgraded.
Microsoft - where do we think you ought to go today?
Big Brother.
They probably invent the malware and insert it with their mandatory “upgrades.”
They already have my info, so what more do they want?