Depends on the player. Can you play a stroke that works for you in pool with the stance that is natural, and therefore comfortable, for you. If so then I say go with it. If not the adopt a textbook pool stance or a snooker stance.
If you start with snooker, or move to snooker and focus on it as your game of choice several hours per day (the first world class snooker pro from the USA will do that, if he isn't already) then you need a snooker stance. You don't need it for pool, despite it having some benefits.
Players (at whatever level from half decent to top notch) who start with snooker and then play pool for years and years usually suffer big time if they go back to snooker because they find they have developed a "pool stroke". Which might actually be a pool stance, I dunno.