>>867754 (OP)
He's not wrong though. The more people work on your project, the more effort you will spend coordinating with them instead of doing "actual work" - and it's a hard rule in all fields, not just programming.
You can be an insufferable sperg savant on your private project that you are working on alone, and that's fine. Just don't expect this model to work well for projects that are too large for a single person.
Of course, that's no license to make light of programming skills. To be a good dev team member, you need to be good at both hard programming and social skills.