This talks about one issue. You seem to be confident that this one case is representative of the whole FOSS space? I am not.
Can you elaborate how it would be much easier in closed source software? Because as far as I can see, it's different. In most cases, you need an actual person instead of an online persona, pass interview and contracting, and then you're still "the new guy" or Junior in the company or project. It's not like closed off from public eyes means anyone can do anything without any eyes.

The beginning of Aperture Science