Obviously many different types of people end up with successful professional careers.
That being said, I think social skills, including team member and leadership skills, are like any other sort of skill: a few people are “naturals”, but for many people developing good social skills is a matter of a lot of deliberate practice, over many years. And for the non-naturals among us, it can feel awkward at first, when we are not particularly good at what we are trying to do. So it can be tempting to avoid social skill development.
And I do think this is one of the top “advantages” that savvy well-established US families essentially buy for their kids. They know how social skills can be very beneficial, including in career development, and they make a point of choosing institutions–possibly starting in early childhood, and continuing through K-12 and then college–where social skill development is encouraged, with plenty of opportunities for progression (like from rookie to valued team member to team leader over a period of years). And as parents, they do their part to make sure their kids are making use of those opportunities, as appropriate for them.
This is not necessarily at complete odds with individual achievement, but I think there can be some tensions. There is a certain model of kid success that looks like a lone kid outworking their peers and accumulating individual accolades. That involves skill development too, but may not leave much time and energy for social skill development.
And again at the risk of over-using anecdotal evidence, we can see sometimes kids who are basically trying to shortcut this process. Like, instead of joining a popular student club and working their way up to a leadership position over several years, they found a student club and appoint themselves President. Or instead of volunteering for an existing local charity where they would get a lot of opportunities to learn from long-term volunteers and paid staff, they start their own charity. And so on.
OK, so on the one hand, I don’t think we should expect all kids to have the exact same personalities. On the other, I don’t think we should discount the importance of social skill development as one of the core types of development for young people. And I do think sometimes some parents are not putting enough value on social skill development.