How is it that being under a delusion would enable you to do something that being enlightened wouldn’t? What capability do you think that sentient beings have that enlightened ones don’t?
The enlightenment that crippled the mind in that way would be an enlightenment no one wanted. It would be worse than useless.So, enlightened ones still have the ability to say or think "I", still have the full complement of human emotions, still have sex, still play tennis and the piano (if they did before). They just don't labor under the same misapprehension as they did before enlightenment.In this instance, they would still mourn the death of a loved one, but they wouldn't make the mistake of thinking that mourning is an endless state, and the sadness wouldn't become an end in itself, disproportionate to the actual situation. They would be very sad that someone close to them had died, but they have a sort of emotional chain reaction or circular feedback in which they were upset about being sad.