It’s plausible that there could be such an effect, yes. On the other hand, there are also indications that a similar effect has a role in reducing the amount of sexual violence (countries where porn was criminalized saw significant reductions in their rape statistics after legalizing it), helping de-stigmatize various uncommon sexual fetishes and preferences and thus being protective of the mental health of their users, expose people to more information about what kind of sexual activities they might like (and thus possibly make them happier with positive effects on society), etc.
It’s plausible that there could be such an effect, yes. On the other hand, there are also indications that a similar effect has a role in reducing the amount of sexual violence (countries where porn was criminalized saw significant reductions in their rape statistics after legalizing it), helping de-stigmatize various uncommon sexual fetishes and preferences and thus being protective of the mental health of their users, expose people to more information about what kind of sexual activities they might like (and thus possibly make them happier with positive effects on society), etc.