And to add to that, all the characteristics listed their green flags - characteristics used to judge people.

I would just append that judging people is a good thing, often blanket misinterpreted as a bad thing. You should make an initial judgement upon meeting someone (it doesn't really matter, your subconscious will anyway). The important part is being willing to update that judgement based on learning more.

I've spoken about this with my girlfriend. She mentioned that we shouldn't judge a book by its cover and I get what she was trying to say but everyone judges and to a certain extent everyone should judge. It's how you act upon that initial judgment and your willingness to append it that shows your character.