So… obligatory not in HR and also not a manager. But I’ve helped hire a couple engineers over the last 5ish years. Seems that HR at my companies filter for college degrees, and basically require 2 - 4 more years of experience (sans degree) or pedigree at their last couple companies. Maybe this depends more on the size of the company, but, for <1000 at each of them, HR is strapped for time and shortcuts the interview process with filters like this. I work with a great data engineer who never finished college and is fully self taught, and we’re currently navigating a recent "degree’d" data scientist hire who appears to have lied on their resume and used AI in the interview. Note, they lied about experience and title, not the degree or the companies. So not something a background check would catch.
Kinda sucks that the first barrier to interviewing at most companies is HR, and they generally are the least qualified or motivated to properly assess candidates. I don’t fully blame them, as there are just too many resumes and interviews to go through for the limited time we have in a work day, but great candidates can come from any background and demographic.
Edit: Sample size of 1 here, so take with an appropriately sized (whale?, school bus?) grain of salt.