This is what I came to say but wasn’t smart enough to put into words. There’s a lot more factors than just being overweight of why a surgery can’t be performed. For a while an issue at my hospital was we were one of the few in the area that could do MRIs on larger patients. So bigger hospitals would transfer these patients to us just for an MRI because their MRI machine was too small or couldn’t handle the weight.
I learned back in high school from a friend out of boredom. Now it’s just a fidget thing. I don’t really go for speed. I just solve it if I’m bored