Not necessarily. It's the same as with many creative fields.
An architect comes up with the overall concept and, if they're famous, gets their name on the building. But they still have a roomful of structural engineers figuring out how to stop it falling down.
Or a musician. Creating an album takes a team of session musicians, producers, engineers etc. But it's the artist's name that goes on the front.
It's possible to do an album on your own, but it takes knowledge of every step in the process. Otherwise you end up with levels all over the place, and people stop listening at the first song that's too much louder than the others.
An architect comes up with the overall concept and, if they're famous, gets their name on the building. But they still have a roomful of structural engineers figuring out how to stop it falling down.
Or a musician. Creating an album takes a team of session musicians, producers, engineers etc. But it's the artist's name that goes on the front.