to a degree thats true but the amount of vitriol expressed to oracle seems a bit warranted. I'm a user of postgres. its widely supported on cloud offerings. Every startup I worked in used it or mysql so it could be argued that postgres is used in a lot more places.
While I certainly have a few issues with postgres, It does the job with minimal bullshit and most of the time, just works. I'm at a point where I just trust it to do its damn job. How often do you hear people complain about postgres or mysql the way you hear people complain about oracle's enterprise db offerrings?