Yep, I'm with you. If others want to point out how their kids gave up strollers, they made them walk, etc...fantastic for them. Terrific. But do what works for you. WDW is an incredibly huge place. Several days of walking can make even very physically fit adults tired, let alone kids. DW and I are extremely fit, more so than the overwhelming majority of adults...especially DW, she's more fit than 99%+ women. However, even she will get tired after a while. Our kids play sports year round, we have them working out and doing protein shakes, etc...but that doesn't mean they wouldn't get tired. So we made the decision to have them in strollers for a long time, and have absolutely zero regrets. When it was 5pm and they were still fresh as a daisy and excited, that was exactly what we were after. Sure, pushing the stroller was heavy at times, but it was good exercise for DW and I.
I know the tops don't come off the WDW strollers, hence why I said "...if you don't rent one from WDW.