I mean for real, that's all a holodeck would ever get used for.
I don't know. By that reasoning, why aren't TVs and DVD's only used for porn?
I'm not saying holodecks wouldn't be used for adult fun, but maybe sometimes people are in the mood of a murder mystery or (gasp!) even a space opera adventure instead?
I mean, why are any of us watching STAR TREK instead of porn 24/7? Or even going on the internet to debate the future of Trek of all things?