Google most likely wouldn't care if they were advertising, however for adverts these are third company companies who have paid Google to be advertised on sites correctly. Adverts you see might not want to associate themselves with certain things, which is why their criteria comes off as stringent.
I'm sure there will be ways to make fit more relaxed without breaking anything, but until that is worked out in thought and also mechanically on the site, it's best to take things easy until then.
