I switched to an e-bike in 2013 because my right knee would swell up trying to ride my regular bike. I was also getting to the point where I had to get off and push my old bike up even small inclines, which gets tiring, especially at high elevations. Now I can ride all the way up inclines as long as they are not too steep. Nice to just ride up places you used to have to push a bike up!!We also have these things called hills here, in fact, there really isn't much flat anything, so any bike ride is a huff. A motor would be nice to ah..help flatten some of that out.
When I stopped at the bike shop to buy my original e-bike, there was a young man there who loved to ride his bike, but his wife had arthritis in her hips and knees, so could not ride a regular bike. He got her an e-bike so she could ride with him.
Also, in one campground, way back then, a man in one of those powered handicap scooters stopped and asked to look at my bike. He got out of the motorized scooter and walked over to ask questions. He said he could walk, but just not long distances, and wondered if the bike would help. I told him that I had mine because my knee would swell up too much because I had caught my foot while going down a museum ship's ladder. Don't know if it will help, but a rental or substantial trial ride somewhere would let you know if one would work for you.
By the way, they do have electric-powered two-wheeled scooters that have a seat on them and a basket up front. You need one that is made for adults and can handle weight, but it is a solution if you are afraid of falling off a regular bike. They look a little like this one: https://www.amazon.com/Beston-Sport...-lpcontext&ref_=fplfs&smid=ADRRLUF4D7OYT&th=1
This one holds 300 pounds: https://www.amazon.com/Folding-Elec...x=electric+scooter+for+ad,sporting,160&sr=1-7