Please explain to them that using a
scooter (what Disney calls an
ECV) is no different than using glasses to see better, or a hearing aid to improve hearing.
It's a *tool* to get a job done, or improve the users life experience. Nothing more.
There are SO many people using mobility devices of one kind or another at WDW these days that I promise - cross my heart, etc. - that your person will not stand out at all. Some people worry that they might be judged by others for using a device, but the reality is that most folks who use one at WDW don't use any assistance at home; only at Disney World where you might walk (on average) between 3 & 10 miles per day.
And if someone does stare? Who cares? You will likely never see them again - the chances of running into someone you know at Disney World are so very tiny - there are *thousands* of people in those Parks every day. And if you do run into someone you know from home? Let's just say that if their reaction is anything other than "Hey! How cool to see you here!" then their momma didn't raise them right. (also, you should go right out and buy a lotto ticket after that, just sayin' because the odds are in your favor that day LOL)
But seriously. Using a mobility device at WDW is no big deal. It's just a tool to enable the user to move around a HUGE Resort while helping safeguard their health, and hopefully allowing them to arrive home after their vacation in the same (or better) condition then when they left. No one wants to get home and have to have a vacation to recover from their vacation!
Guide your person here - have them ask us all the questions they want. This is a no judgement zone, and we will be happy to answer all the questions they have, and help them get ready to use an ECV at WDW if that's the right solution for them.