what is a professional? Steve Vai? He knows all his scales. Eddie Van Halen? He's mastered scales at 12. Jimmy Page? ditto. Buddy Guy? He invented one.
If you're talking about a touring musician, or a studio musician, they absolutely know their scales.
Anyone who makes more than $20k/year with their guitar knows their scales.
If you're talking about a touring musician, or a studio musician, they absolutely know their scales.
Anyone who makes more than $20k/year with their guitar knows their scales.