Also Locke's tirades against older prospects is annoying in that he always frames it as they are playing against 18-20 year olds when the reality is that most college players are also older
It's really more the other way around. The reason why younger guys doing anything in college is impressive is because they are doing it against guys much older than them. I think this is important though because it helps you identify talent outliers which the NBA is a league full of talent outliers.
I've made several posts in the 2023 draft thread about how you shouldn't overlook older players and that they can be productive rotation level guys, and so I do believe you shouldn't automatically discount a player because of their age. However, I do think it's important to weigh in the risk of drafting an older player, as draft history would say they don't typically pan out.