That's because you've been exposed to the worst of the worst which is in-cels.me and PSL. You don't hear about the in-cel minding his own business watching anime at home.
As far to my knowledge, in-cel virgins are certainly welcome here as there is no rule against them. The only rule coming anywhere close is this:
>2. Do not state or suggest that you had, will have or want to have sexual or romantic experiences.
If the in-cel can stick to this criteria, he has every right to be here. This is as opposed to nonvirgin normalfags who would be breaking rule 1 merely by virtue of posting here.
Note you can't strictly speaking moderate rules 1 anyway because you can't tell who's a virgin and who's not unless they explicitly say.