Agreed, although I might frame it as "skilled in this aspect of management" vs "less skilled."
It is a learnable skill, that can be decomposed into smaller skills.
Many managers were field promoted due to making the critical mistake of being too competent, caring too much, and accidentally showing too many leadership attributes. They never got any real training in the art and science of people management.
It's stressful to feel responsible for people's careers without these skills.