[socketnaut]

Depends on your field. If you're studying mathematics or computer science, learning happens mostly through deep work in isolation and there's enough material out there (books, papers, etc.) to support more than a lifetime of problem-solving.

Events and conversations might offer superficial exposure to new ideas or areas of interest but actual understanding requires extended, focused thought that nobody else can do for you.

[burntoutfire]

In mathematics it's pretty easy to get stuck and I imagine having a regular 1-on-1s with a tutor could be of great help. (However, Internet forums could to some degree perform similar function).