you only miss the cheer competition if you go with Gaby, Tori doesn't have anything to do with it, you can fuck Tori and still get in time and you only lose points with Valeria for Tori, Layla/Elena for missing the competition.
But, you might be right about the logic behind the choice, if you reject Tori MC mentions that he knows how she is and she even keeps a list, but its still bad game design, because the player that plays blind and never backtracks to check other choices has no feedback why Val suddenly likes him less, hell if I didn't have URM I would not notice that I'm missing points.
Fuck sake, everything with Nyx is like opposite of what makes sense, it should be you pick choice A, you get feedback for choice A, here is you pick Choice B, you find out
potentially, since its just MC' supposition', that if you pick choice A she might keep a list of guys she fucks and other girls might see the list, so fucking convoluted for no reason whatsoever.
Plus Tori already fucked the MC in my playthrough, so he should be on the list regardless.
I feel like if I ever put effort into analyzing this game in its entirety I will end up with Hulk Hogan's haircut from pulling my hair.