The top players have a responsibility to the sport that pays them their wages. No-one here is arguing that Ronnie isn't the best around by a mile or possibly the best ever, but with that should come respect for the sport and him not going to these tours will reduce the sponsorship income and shit on the other players.
They don't get wages. They get winnings for where they place in the tournaments they enter and they get personal sponsorship money. They owe nothing to "The Sport". Snookers governing body has been known to be terrible at looking after and supporting its players. You only have to look at the contempt Hearn shows the players and the complete lack of respect he gives them to realise that.