As long as you think of "quality" as "something that is not quality". bad logic. There are many systems that are only usable because they are popular but everyone hates them and thinks they are garbage. Market capture doesn't equal quality, sorry, that's a horrible take.
That's a fair argument as to why someone should use windows. What does that have to do with quality though? You are confusing two things. Whether you should use it or recommend it is not the same as whether it's good quality.