Hence, their dislike of any kind of licenses which impose restrictions on consumers of the code/binary.
I'm not saying I agree, just presenting what I believe is the thinking behind this kind of policing.
To me, the OSS movement seems to be split between a minority of extreme idealism (Richard Stallman's position on the importance of software Freedom), and a majority of mostly big corporate pragmatists, which have realized that is far more lucrative to share the burden of developing common infrastructure between themselves than the previous status quo; and who greatly dislike anyone who tries to co-opt the OSS movement into something which does not serve this purpose. There is also a 3rd camp of companies that want to sell proprietary software, but who have noticed that open source variants of their software are a better marketing strategy than the shareware and freeware of old.
I believe that this third group is the biggest annoyance to both of the traditional OSS communities, but also the only ones who can actually make money by selling software whe also showing users exactly what code they are actually running.
FOSS is also written F/OSS. It reflects that the common meaning of open source and the less common meaning of free software are almost identical. GNU says "...we know of only a few cases of source code that is open source but not free. In principle it could happen that some free programs are rejected as open source, but we don't know if that has ever happened."[1]
Source available is an unambiguous and more descriptive name for the kind of software that matters to you. Nobody can force you to call it that. But don't expect other people to change their definition of open source.
That says nothing about their ideals. Microsoft coined shared source the same year Steve Ballmer called Linux a cancer.[2][3]
[1] https://www.gnu.org/philosophy/categories.html.en
[2] https://en.wikipedia.org/wiki/Shared_Source_Initiative
[3] https://web.archive.org/web/20011108013601/http://www.suntim...