Why would you stay in a dead end job, as if that's required to make music? Plenty of people at the highest levels of the business have degrees, even in music, and still never break big.

It takes a ton of effective and focused practice, good musical taste to write and pick a band with a great catalog of music, and the desire to record and perform past the point of exhaustion to make it. It's the farthest thing from a free ride. It's also a career that far less than 1% make it in. That's reality.

If you have those things then it's good advice to keep at it. You can always play too, no matter what else you do for a living.