It's not that simple...
If we take my Monica's journey (decent playthrough), here's what it looks like in the context of all the episodes.
then after Monica's little monologue is the scene of
her first introduction to prostitutes. (yes, I remember about the grey mouse). So we have Ep4v1 and the opportunity to join the Work fom Mommy prostitutes for the first time! However, even without ever working for this pimp or even approaching or interacting with her, such a Monica can still get a Glory Hole scene in v2.
Below I'll explain why this is possible.
To summarize the above.
In my opinion, it would be more correct if the huge "Slum Prostitution" path and the equally huge "Shinу Hole" path were not hardwired to each other. Plus, it goes against the
game's concept, which states that most paths are independent of each other and the player can only choose what they like.
Obviously this doesn't always work when it comes to the main Office/Photoshoot storyline, but that's where the "rules have their own rules"...
But when two side and simultaneously gigantic storylines (Shiny Hole and Slum Prostitution) become tied to each other, the variation and ability to abandon one (Prostitution) without sacrificing the other (Shiny Hole) is lost, and thus a certain freedom of choice is lost, which is not a good thing. (imo)