is exactly like saying “why don’t you just buy a house?” to someone complaining about their landlord.

What an idiotic comparison.

Buying a house costs so much money and time that most people cannot afford to, and those who can generally must go into debt for most of their remaining lives in order to do so. Suggesting FOSS to replace “whatever commercial software they use” is the polar opposite, in that it’s literally free (usually in both senses of the word). It’s more like suggesting that someone consider a new route to commute from home to work.

Also, this opening…

Okay, all you open source evangelist people: your knee-jerk reaction to come at people

…is incredibly reductive and combative. The world needs less of that, not more.