I totally agree @MartDM. My 6 yo (soon to be 7) uses a stroller at the parks. Big woo!
He is athletic, swims, is a blue belt in karate, takes gymnastics and just started to learn to ride my horse. Go ahead and be as judgmental as you want. I couldn't care less. I'm not talking about those offer a different perspective or experience -- I'm talking about those that are "oh so shocked" one might even consider using a stroller in the completely artificial marathon of a place like Disney. It isn't anything like real life. I'm not worried he's gonna start riding in it other places or ask for his binky back. Seriously people.
We have gone several times per year since he was one and always had a stroller. He wasn't always in it, but certainly used it a lot. He appreciates having a seat, shade and snacks. After fireworks or our last ride of the night, he frequently curls up and sleeps on the way back to the hotel, meaning an extra 30 mins of sleep that night. I don't have to worry about mis-timing a break and finding myself in the far corner of the park with an exhausted child. I have a little cushion that I can use to make it out of the parks very comfortably for all, if schedules don't go as planned. As someone else mentioned, I also appreciate knowing exactly where my child is in very crowded situations and it gives me something to brace against when I walk (bad back) and means I don't have to carry a bag. Why do people care? Silliness.
In approximately 15 trips, he has had exactly one meltdown, ONE, largely because he is well rested and well fed. He was three years old at the time and it lasted all of about 60 seconds, because he was able to jump in his stroller and nap on the way out of the park.
Honestly, I would bet that many of the "my kid would rather hike 100 miles in a snowstorm than use a stroller" are the ones with kids melting down. Every trip I see kids looking enviously toward the oasis of our stroller with shaded seating, fresh fruit from the cooler, and drinks. It's not the Bataan death march. It's supposed to be fun.
We adults don't "need" poolside bars with waitresses bringing us tropical drinks in carved out pineapples, decadent dinners, or spa visits either. I can assure anyone who is worried that I'm in no danger of expecting my boss to bring me a tropical drink at my desk or to get a massage in the middle of a meeting when I return from vacation (though both would be nice!). I can tell the difference between vacation luxury and so can they.
You take care of your kid and I'll take care of mine and we'll leave it at that. Our kingdom rental stroller will be waiting for us at our hotel in November, and I couldn't be happier.