You are 100% mistaken on that.
This is from the FAQ's that were issued regarding the latest gratuity increase.
10. Are all guests required to pay gratuities?
Gratuities are at the discretion of each guest. Such guidelines serve as a recommendation to assist guests in expressing their gratitude for the outstanding service that our crew provides. The daily gratuity is shared among dining, bar & culinary services staff, stateroom attendants and other hotel services teams.