Throughout Star Trek, the majority of scientists / officers / political figures all appear to have either graduated from Starfleet Academy, or from a graduate program such as those as the Daystrom Institute, or from the Vulcan Science Academy.
Why aren't more current top schools represented throughout the various Star Trek series (i.e. MIT, Harvard, Yale)? Some of these schools have been around for 300+ years already and so it seems fairly reasonable that they would continue to exist. In "All Good Things" (TNG series finale), we do see the University of Cambridge, where Data holds the Lucasian Professorship of Mathematics.
But why do we hear about so few others? Is there an in-universe explanation for this?
I understand that many characters have worked exclusively in Starfleet and that, accordingly, most of the officers would have graduated from Starfleet Academy, but it still seems reasonable that other schools should be represented.