A suggestion for when a large group WDW stay is considered again (if it is)--
Don't promote
scooter use for the elders unless they seem initially receptive.
Instead, encourage them to watch park and resort tour videos to see for themselves how much walking there'll be. And, not so much the professionally produced ones which tend to edit or speed up the long walk stretches to get to the shops or attractions quickly. The amateur videos often show more accurately how much walking there actually is.
And, if they still insist they can do the walking, accept that for the moment and drop the topic. They'll find out for themselves whether or not they can once they get there and try it. At which point, getting in-park scooters or making a call to a rental agency can be done as needed and desired.
Even though elders know
intellectually that mobility aids would make their experience much more enjoyable and easier on them, it can be sooooo very difficult emotionally to admit that to themselves. Such admissions can feel like, "I'm OLD and decrepit." Amplified, when younger relatives start promoting mobility aids which the elders never use at home... "Oh. So
you think I'm that old and decrepit, huh?"
It's weird. I know from experience. It took me over 6 YEARS to admit that I should get a hearing test despite knowing I probably had some hearing loss. And, yes, I do have some and now have hearing aids at age 72. Which I wear but still feel mark me as falling apart, ridiculous though I know that is.
It can be a very sensitive issue, needing such aids. Go cautiously and gently when raising the topic again, please.