I have bought many computers that have Windows installed, they have all been trivial to replace with Linux installs. On almost all of them, I never even booted into windows once.

Was it wasted money going to Microsoft? I don't know, I bought the computers because the price point worked for me. I have also built a lot of computers myself, but most of the time my home built machines end up costing more than the pre-built one that has windows installed (although my parts are probably nicer, but maybe not always).

This is like a ton of things you buy. Sometimes they include parts you don't want, but if the price is good, it doesn't matter that you discard part of it.