I'm not suggesting by any means that the same arguments should apply for both football and basketball, but discussing Gonzaga and whether they deserve a 1 seed is very reminiscent of discussing UCF and whether they should get a playoff spot. The argument against UCF was "if they played a P5 schedule, week in and week out, facing the top level of competition, they would definitely lose a few along the way and we wouldn't be talking about them".
When I look at the WCC standings, it appears there is likewise a huge drop-off after Gonzaga. No other teams in the top 30 NET (and only one other in the Top 70). Gonzaga had a nice neutral court win over Duke, certainly UCF didn't have a comparable non-conf win. Other than the tourney winner, I don't believe the WCC will put another team in the tourney; UCF played six bowl teams in conference.
Why does nobody ask "if Gonzaga played in the ACC would their resulting record put them in the discussion for a #1 seed?"
Very beginning is all you needed. Basketball is not football.