It needs to be reinforced by the team, and not left up to the individual. A team or manager can encourage the behavior (even by just setting expectations at the

It needs to be reinforced by the team, and not left up to the individual. A team or manager can encourage the behavior (even by just setting expectations at the time of hiring) and based on that, hopefully, some technical leaders are encouraged to lead by example. I also think it has to be part of a bigger strategy of egoless collaboration, and not hiring assholes.