In the world we live in, going slow is underappreciated. Some things really need to be done slowly to maximize their outcome.
Skill learning is one of them. The slower one works on learning the better their mastery of the skill. I can argue speed is one of the top reasons people give up.
Being slow is also worth it when there is a high cost for error correction. This is one of the reasons moving fast is celebrated in the software industry as the cost of error correction is not high relative to other fields such as medicine.
Slow is not always bad.