Isnt the reason snooker is popular is because it is wagered on like football or golf? I dont think its nearly as exciting as pool
Snooker is popular in Europe, as it is a game that is easily accessible to the general public, everyone can play it to some degree, it is a game that anyone can get decent at and it is widely televised in Europe. The gambling aspect has nothing to do with its popularity in Europe.
On top of that there is one governing body, this has helped television and sponsorship negotiation and given it a prestige to be a professional. A professional is recognized by the governing body as being a professional. Where as in pool it is a complete grey area as to who can legitimately call themselves a professional.
Kids growing up, also know that if they practice every day they could grow up and be like one of the pro snooker players they see on TV, who are idolized as well as making a very nice living.
Pool has a different range of creative shots, so is in itself a difficult game to become exceptional at, however as it is extremely easy to pot balls at pool, it is not easy to see how skilled you really have to be to be a pool great. I think this one of many reasons why pool is not seen as a big ratings grabber.
Snooker people are not fooled in to thinking it is easy.
Also, TV coverage of snooker does a great job of introducing the players to the public (prime time TV appearances, sections of snooker coverage following the players, etc), this makes the public care who wins and loses.
The general public don't give a monkeys who wins and loses a pool match.
I am a fan of both games and i may be completely off kilter with my observations, but i think these are the reasons why the two games are revered completely differently.