The problem with connections is that some people have none.

I help immigrants for a living, and the biggest underlying challenge for recent immigrants is the lack of a network. They truly start from scratch, so for a year or two they are often completely alone.

Networking is absurdly effective, since all nodes stake their reputation every time they recommend another node. However it only helps those in the network. This leaves a lot of good candidates out. It can end up creating sort of exclusive club.