Earlier quoted context omitted.
So, according to Wikipedia, 18 justices graduated Harvard, 9 Yale, and 39 some other law school. Yes, it helps to go to Harvard or Yale. But most justices didn’t.
That's a good long term historical view, and provides some hope. However, the current court composition is what we face today, and there are members who will likely be on the court for 30 years or more. While the historical picture is more encouraging, it doesn't negate the significance of the current makeup.
What becomes concerning is when legacy students dominate the court. That is categorically unfair by structure, and it would speak to a hereditary elite in power. This was, as I’m sure you remember, the distinguishing factors of GWB vs Obama. Obama walked in those circles by earning his chair. GWB… well…