The only upside to recovering from a torn meniscus will be at the end of the night when you can collapse into a front gate wheelchair and ride it out to the bus station without guilty feelings. You’ll probably want to have a crutch with you as well.
I speak from experience.
Then again, I can also blame WDW for the torn meniscus in the first place.
It depends on how long it’s been since your surgery and rehabilitation. If it isn’t long, and you have a great deal of pain, I would not be so proud as to not rent a scooter.
But if you’re like me, 4 months later, you should be able to deal with walking with a crutch. (And guests will give you some deference if you’re using one crutch, maybe even more than if you’re in a scooter)