most people completely ignore the idea behind it being a fallacy and just pretend it means any sort of social deline is a fallacy, when in reality it's saying you can't argue A will lead to Z without arguing the steps between them.
The go to example to dismiss slippery slope is " if gays can marry eventually people will marry dogs". The gap is so absurdly vast that it's nonsensical, well if you ignore furries. The meaning behind the example though is by skipping the steps between the top and bottom of the slope you can argue almost anything can happen because you don't have to map out any points of the inbetween.
its not the delince thats the fallacy, it's the leap in logic that is.
"Accepting gay marriage lead to open pedophile" would be concidered an argumentative fallacy because the large leap
"Accepting gays marriage leads to government forced acceptance of gays, which leads to socially forced acceptance of gays, which leads to fringe sexualitys forcing them self under the gay rights umbrella, Which leads to pedophiles getting socially forced acceptance under gay rights" is not an argumentative fallacy because you're show exactly what whould lead to what.