I've done the walk of shame quite a few times. It sucks, but I was never angry at the ride operators or the engineers who made the ride. Usually the kids operating the ride would do everything in their power to make me fit, but sometimes it just wasn't meant to be. I'm sorry that this happened to her, I've been there.
When I could no longer fit in my favorite ride that I could always ride, it was a bit of a wake up call for me. It wasn't the only factor, but since then I've dropped over 109 pounds, which may be closer to 115 or 120 (I don't know my max). I wanted to be able to ride all the rides at my local Six Flags and I was also really worried about Pandora. My first weight loss goal was to be able to ride every ride at my local park. I was able to accomplish that and ride all the rides at Six Flags. I also wanted to be able to ride Pandora and to be able to ride a horse at Disney World if I wanted to (250 including any clothing is the max to ride a horse at Disney World) before my trip this past January. I lost 80+ pounds by then and I rode everything without problem.
Maybe they could have engineered that ride to make larger people fit, but in my experience it would probably not be very pleasant. Rides where I could barely fit at 290 pounds and 6'2" hurt like hell. I don't know this particular ride, but I'm guessing it's fairly intense if it had shoulder restraints.
I'm still losing now, but it's much slower. I was in the obese BMI category and now I'm in the normal category. I'm wearing clothes that I wore in high school and I haven't felt this good since I was a 1L in law school when I was running triathlons. Not only can I ride all of the rides, but rides are much more comfortable and the roller coasters don't hurt anymore. I can also sleep a lot better and walk a lot further. When I was 290 there is no way I could have walked over 100 miles at Disney World, but I did that in January.
Maybe she thinks I'm silly for using the experience of not being able to ride a ride to take stock in my own health, but it provided some much needed motivation, showed me in a physical way that I had a problem and provided a goal that I could actually see. Even when I could start riding those rides again, I then wanted to be able to have more and more clicks. Maybe it's silly, but it worked for me.
The last time I went in to see my doctor she didn't recognize me and there was a computer error because I lost so much weight.
My goal now is to get to 116 pounds lost. Which would be 40% of my starting weight. I'm not sure if I will stay there or if it will eliminate the last bit of belly-fat, but I just want to see if I can hit it.