At every all-hands meetings, core team gets to present, gets to showcase the new features, gets celebrated for "going the extra mile" for customers.
But the real extra mile, is the patience, empathy and thoughtful communication (which is a rare talent, really) of the entry level engineers, who are also humble and nice to be around with, being the only ones who contribute positively to the company culture, as opposed to the ego-tripping 10x engineers.
Management thinks they are absolutely replaceable. Even more, when the concept of "AI agent" appeared on their radars, they were the first people who they thought they're gonna replace.
But the real reason to replace them is to please investors who don't wanna be behind the AI-efficiency-hype. They can't be promoted to a core team, because where's the efficiency in that?