What relevance does that have to do on whether you can do your job or not, though?

And here's another example of specifically parent occupation:

https://qz.com/1055416/americans-would-be-shocked-by-common-...

While that site is basically correctly, "not that long ago" should be interpreted more like "within post-war era", not "a few years ago".

Photo yes, Familienstand yes still today for conservative companies, parents occupations not since probably the 80s in most places that would consider foreigners at all.

(It is, as you say, all fairly obvious bullshit designed to make sure the right social class gets preferential treatment...)

Paid parental leave maybe?

Also if you have children you might be absent because they are sick and whatnot.

So yes probably discrimination.