You’re talking about walking short distances, but that isn’t really what getting a
scooter is. It’s parking the scooter down by the carousel and walking back over to Pooh and then standing around for 30 minutes with nowhere to sit. If you have a rental scooter (as opposed to a wheelchair), it won’t fit in the queue. Well, I think it does fit in Pooh, but you know what I mean. A wheelchair goes up to the ride vehicle pretty much anywhere. They park it at the ride exit, and you’re back in it a few minutes later.
Id have a serious discussion with your doctor about whether you should be standing around half the day and walking the sometimes significant distances to scooter parking. Scooter parking for dining, for the restroom. A wheelchair makes a significant difference in the time on your feet. Even if the Pooh line isn’t much distance, it’s still standing around for 30 minutes and every ride is figuring out where to park and what to do. They’re supposed to put you in Disney wheelchairs after you park your scooter at some rides, ugh. I’d just start with a wheelchair.
A motorized wheelchair takes the pressure off, (almost) always fits in the queue, and you’re the packhorse for all your kids, which is convenient for everyone. To me, an injury this serious wouldn’t be worth risking with a half-solution like a scooter.