Even if it were true, this isn't the "entire point", or at least not to everyone. You're talking about communities that have diverse interests, and only a subset of those people are into avoiding all dependency on commercial software in the FSF or Debian sense.

"FOSS" includes Windows developers, Mac developers, iOS developers, Java developers, people working for bigtech corporations, and some bigtech firms themselves. (Some parts of these firms some of the time, anyway.)