To be clear most new grads and people seeking internships..don’t. Even getting into Hackathons was very difficult when I was in undergrad (right around peak Hackathon in 2014/2015). Generally the people that got in and got good internships were the ones that already went to top schools. And all of that is before the interview prep training, the fact that 50% of coding/algorithmic interviews are just proxies for either raw IQ or remembering the problem, etc etc.