If the rule is wrong then it's really good news! At least for my mental state, as I've spent countless hours practicing music in a span of 15 years and still pl

If the rule is wrong then it's really good news! At least for my mental state, as I've spent countless hours practicing music in a span of 15 years and still play worse than some of the self-taught beginners with 3-4 years of experience. It's depressing and is already becoming an obstacle in motivating to practice further. If the rule stands, it means it's my fault: I'm not motivated enough, not passionate enough, not smart enough to organize my practice routine. It's what I'm thinking today and what hurts my self-esteem. If the rule's wrong that would be a relief, as it means it's not completely my fault.