I don't think we'd have a circuit if it weren't
for grad students. Grad students are the ones who
know the ropes of qb, help with transportation, and
generally make teams viable.
If you're a younger
player and you lose to a grad student team, you have
nothing to be ashamed of since you weren't expected to
win. On the other hand if you do win well then you've
really achieved something and you can be proud. Think of
it as a win-neutral situation.
If you still
dislike playing grad students, there are a good number of
tournaments where grad students would be absent. You just
have to pick and choose.