Because in all practical senses, windows is a virus.

Viruses at their core are programs which do things against your will on your own machine. Which is bad.

However, that is exactly what windows does. But like the boiling frog, people for some reason are okay with more bullshit from Microsoft and less control of their own devices with every passing update and year.

Complaining on ~~reddit~~ social media does nothing. Switching to Linux gives you back control and will be better for everyone in the long run.