The NET isn't even used to seed, much less choose who makes the tourney. It's used to determine quality of wins. That's it.
UConn is ranked #11 in RPI (traditional metric). RPI is just winning percentage of teams you've beaten plus winning percentage of teams they have beaten.
UConn is ranked #4 in NET and #2 in Kenpom. That's taking efficiency and margin of victory and whatever else into account.
With the NET ranking, the intended usage is beating UConn gets viewed as beating the #2 or #4 team - because UConn is a really great team, but RPI does not reflect that.
However - the NET is only used to determine quality of wins. Such as getting proper credit for beating UConn.
But it's not like the selection committee is like "Seton Hall has a low NET, let's exclude them from the tourney." Bias is a different question.