Private lessons are an extra opportunity for those who can afford them. I feel like a mental block child needs to do private lessons. I also feel the athletes who learn best one on one should take privates. You can recognize these athletes because in a group they wander and don’t get anything accomplished.
You must be careful that your private does not become a spot session only. The instructor should be conditioning the athlete and perfecting their technique. You can spend thousands of dollars just being spotted and never achieve the skill.