At least they stick with one tech longer than five minutes. The ADD-riddled folk that sometimes post on here, changing their tech stack based on the newness in milliseconds of the latest craptastic JS framework is astounding.
Then there's a whole "stake you claim" mentality. Want to be the best C person in the world? You can't. It's too wide spread. What to be the best Go person? Sure, fight that battle for your own glory since it's new and you can take part in everything.
Lack of education/experience also creates a great breeding ground for new, duplicate, half-implemented versions of things that already exist. The older a developer gets, the more they see things they already know re-implemented as completely new but with unfamiliar interfaces they'll have to re-learn again every 6 months. It's a huge waste of human capacity to always be "new new new" instead of creating a stable and reasonably extensible base to work from. But, at the same time, we don't want to be stuck on Perl 4 and CORBA forever.
There's a tradeoff between building new things for advancing the future versus building new things just because you think you're better than all the previous research/experience that has come before you. See the case of Cathedral v. Bazaar.