The only time I ever removed the gratuity was on a Golden Princess Australia cruise in 2019. It really got my back up that we had gratuities added to our account because we are from the UK, whereas the other 90% of people onboard, being Australian, didn't pay.
And before anyone says I paid less for my cruise, I compared prices on the booking day between UK and AU site and AU site was actually a tad cheaper grrr!