Can you please advise me of any negatives in wearing Adult incontinence pull ups when the user is continent ?
I am not sure why you are thinking about this as you say the person you care for is continent.
It would be a waste of money and unnecessarily embarrassing for the person you are caring for.
How would you feel if someone started making you wear nappies to bed?
There is also a risk that the person starts to use the nappies rather than go to the loo normally and that could cause the onset of incontinence as they lose the ability to control their bladder properly.