To be really good at something it is necessary (but not sufficient) to be interested in it. Running a company of 10 people is an experientially different thing

To be really good at something it is necessary (but not sufficient) to be interested in it. Running a company of 10 people is an experientially different thing than running a company of 1000, just like collaborating is an experientially different thing from doing stuff on your own and playing video games is different from using Excel. Being interested in one is no guarantee of being interested in another.