Do you have any specific notable examples? In my experience, FOSS tends to take a more no-nonsense approach to things.
How does a product that defaults to its own proprietary for-profit offerings providing a better user experience?
The argument I hear most of is that people are just used to what they’ve used in the past, and having difficulty moving to an alternative because of that isn’t indicative of the alternative offering worse UX, but rather an unwillingness to learn anything by the user.