If that’s the case there’s no need to start a publishing companyI would say yes to that question.
I imagine the umbrella LLC would be a record label which is simply to record and sell my own records.
Not really aiming to sign others.
Trying to work in the industry without having to sign with anyone else.
If signing others ends up making sense then I'm open to it.

If you’re doing your own music just get artist publishing and start pushing your music to as many outlets as possible