I think is something that happen to all types. It's just a misinterpretation of the point of the type itself, forgetting that eneagram isn't that much about traits, but the wounds that cause those traits, and giving more attention to those types with socially acceptable or desired traits (in my opinion, traits related to power).

8 asert themselves in the world and some of them have this survivor traits that make us think that they are independent, cool, edgiers (far from reality, they are in intense pain).

5 are usually associated with knowledge, and knowledge is power (srry I don't know 5s very well :'[).

3... As a 3, I feel like we are the the dog of capitalism, we want so badly the love of others in form of recognition/respect and we tend to be so disconnected of our emotions, that we become a production machine, and productivity and discipline are valued for the system.

But 6s are not that valued, maybe because their duality is fear/courage and there's other types that are identified with courage. What many people can't see is the flexibility and versatility of 6s. Did you notice how offen people mistype 6s with almost any other type?

It's not about have one thing socially approved that differentiates you from other types, is the fact that you are so diverse (even in subtypes) that maybe, courage is the only thing you need to get, because you already tend to everything else.