younger people are (generally) better at thinking up new ideas/paradigms and novel ways to do things
As a guy with some experience, all I hear is "younger people blindly follow the newest fads". As it turns out, there have been very little new ideas in IT, and most of the New! Improved! ways promoted these days are merely restatements of old ideas, or old ideas that got discarded for being unpractical.
But in an industry with an institutional memory of barely a decade, that sounds like innovation. And it's self-reinforcing due to the fact that not a lot of employers appear to be interested in hiring experience, instead being dazzled by the Cult of Youth.