[domk]

Being a good manager is a skill like any other, something you have to learn.

In the industry, being someone's line manager and looking after their wellbeing and professional development is often considered a job in itself, and people in that career track get selected, rewarded and promoted on the basis of being a good manager.

In academia, lab leaders are leaders because of their academic qualities, and whether they are good managers is completely secondary. They probably receive very little to no training and aren't evaluated on their management skills. Understandably, they focus on growing as researches, not as managers.

That is why so many supervisors in academia are very bad managers.