No, you used the correct description first "professional (rock) musicians". Obviously being a profession user or a certain tool isn't simply equivalent to being

No, you used the correct description first "professional (rock) musicians". Obviously being a profession user or a certain tool isn't simply equivalent to being the engineer of that tool: accountants are not software developers merely by virtue of using excel, drummers don't know how to build drums just from banging on them, and Simone isn't a professional robot engineer just because she has a Kuka arm in her house.