The real problem is that people don't see the skill in fixing a bad shape. It's not just making hair shorter, it's fixing angles someone else messed up. A good cut starts from a good foundation, but a great cut often starts from a disaster. That client would change their tune if they saw the before and after of a real correction.
Had a client come in last week after their neighbor tried a "wolf cut" tutorial from TikTok. @morgan.jason, the crown was basically sawed off and the back had a step where sections were missed entirely. Had to do a short textured crop just to clean it up and even the growth pattern back out.