It’s not full privacy or no privacy at all! Everyone has a different threat model which utilizes different practises. Yes, windows is no good for privacy, but limiting what windows can collect, and not using 3rd party software that collects even more info can be a pretty good start for most people. Also not advertising personal information on social media (or using privacy invasive social media at all)!
With just these you’ll have much better privacy than anyone around you and a pretty good level of privacy in general! You can do so much for privacy but you’ll have to face the comprimises the more private you go.
The think is do you need to go that deep for privacy or is something less private a better solution for you?