I'm not in the field any longer, but when I was (pre-LLM) every job I got save one was through my network. And it's 100x more important now.
Why did they do that?
As one of those new grads, I'm frankly not seeing where I could expand my scope to. Most random tech workers, outside the people I know through a past job, wouldn't want to know me, a random person. Everyone always suggests networking and going to events in the vaguest possible ways, but I'm not seeing any results in terms of establishing actual, real, interesting connections through the watered-down LinkedIn version of interaction. I would have to either build something so profoundly interesting that they would come to me first, or get to know someone in the field via some different means (like an unrelated hobby). It feels like there's very little that can actually be done productively. If you already happened to know someone somehow, you have a shot at the golden ticket, otherwise it's pretty bleak.
Of course, people skills are necessary... https://www.youtube.com/watch?v=fcIMIyQnOso
In contrast, my Dunbar number is about 5. I need a few days to calm down from meeting new people. I can't imagine putting in the effort that he does in collecting people. COVID lockdown was a welcome break for me.