Is Harvard a magical key and door opener for high paid jobs?

The short quick answer: What you see in movies is not reality.

The more detailed answer. Graduating with a Harvard degree does NOT open any more doors than graduating from Yale, Princeton, Stanford, MIT or dozens of other colleges. Here’s a good article for you to read: https://www.wsj.com/articles/do-elite-colleges-lead-to-higher-salaries-only-for-some-professions-1454295674