> [T]here are a LOT more tall people than overweight people.
Just to put some numbers to the facts:
https://www.nyc.gov/site/doh/health/health-topics/obesity.pa...
> More than half of adult New Yorkers have overweight (34%) or obesity (22%).
Even if you're using a definition of "tall" meaning "taller than average" (50%), a larger percentage of the people are overweight in NYC.
There's no single threshold to say you're fat and you're thin. I'm sure cinemas could put big seats in for the overweight but at some point that 99.99% person is going to visit and be too big even for that.
Fat people are discriminated against, but the question is how much should obesity be catered for, and what range in body size?
Alcoholics and drug addicts and are also discriminated against by society, so shouldn't these lifestyle choices also be protected by the law?