Dude. You are demonstrating, repeatedly, that you do not know how publishing works, have no idea what the different jobs are and why they are different. You display shock and anger at the notion that different people have different roles in which they do different work. This offends you for some demented reason that I do not care about, and you are repeatedly attacking it with insults and invective -- and then when I point this out to you, you are hurt and offended.
This is how the job is done, and there are good reasons, and it works. Since you are a random angry shouty man with a made-up name on the internet, I am not going to waste my time trying to explain it to you, as you will just shout insults at me from behind your silly offensive pseudonym.
You don't understand and it is very clear that you don't want to. You prefer to hide behind a made up name and throw insults.
I am not playing your childish game.