It’s not completely that white space is bad, but in particular that white space is very difficult to template relative to something character-delimited like JSON or s expressions.
In JSON or s expressions, the various levels of objects can be built independently because they don’t rely on each other. In YAML, each block depends on its parent to know how far it should be indented, which is a huge pain in the ass when templating.
For a lot of fangs, unless its a bad enough publicly facing bug that it gets notable coverage, it's easier to get hired to the team to fix it yourself than it is to successfully complete all of the following:
a) get a human to look at your externally submitted bug report unless you just get lucky with one of their team seeing your reddit post
b) get that bug accepted by the team as a bug
c) get the bug prioritized to the point that it isn't "bankrupted" to make the team's stats look better at the end of the quarter
d) actually fixed
And somehow, this dissonance meshes fine with allowing/encouraging their management chain to run roughshod over [neuro and other]diverse employees. Eyeroll at best.
This argument kind of died when python became one of the most popular programming languages used.