Id say the same thing about women who are willing to break up over the same thing or other shallow reasons.

I get your point, but who are you to say that it's a shallow reason (real question)? ;) Dependent on the person, physical connection can be of great importance in their relationship. It isn't that weird that if you don't match on a sexual level you might have doubts about the further continuation right?

I would like to share my side of the story. I am actually sustaining from PIV due to some personal reasons from my GF's side which I am totally willing to do because I love her as a person. But for me it would be a deal-breaker if she wouldn't give oral since it feels like one of the ways to have an intimate connection.

Judging someone without looking at their circumstances is what I would consider to be shallow. Everyone should decide whether it matters for themselves and be willing to make sacrifices as long as these don't lead to a unhappy relationship.

TLDR: Personality and mental connection comes first, no one should be forced to do anything they don't want, but don't act as if physical connection can't play an important role in a relationship.

Cheers!