Not necersarilly true
I have come across a rare few games that have a great story with fetish mixed in.
This game is based off of SB, which had a great story throughout the game with fetish mixed into it.
There are diamonds in the rough, even Eternum(Not a weight or vore game) has an interesting plot with fetish thrown in that makes the game a bit more interesting than just a constant barrage of only fetish.
Evoria is kinda cool, however my gripe is that some of the stuff going on with that game makes no sense to m,e but hopefully it will get cleared up eventually.
TLDR: There are diamonds in the rough that are not all just a Corn game