Discrimination? If you really want to go down that absurd road, I want special accommodations for being short. I want free seat pillows in movie theatres. I demand that bars implement rules that require tall people to crouch or bend their knees while on the primeses. Roller coaster minimum height to ride rules are discriminatory; let's make those illegal too. Because ME ME ME ME. Now let's talk about catering to my extreme and the GP's extreme; oh wait, thats how you get averages, you say? Thats that the market is doing, you say?

Operating a "discriminatory business" is absolutely a human right, because I dont owe you any more than what I agreed to before payment. All businesses are by nature in some was discriminatory, because of the laws of physics at the very least.

We have already had this discussion politically, and businesses must make reasonable accommodations for those people that require them. Furthermore, businesses must serve black customers and white customers as equals. And if they bake cakes for straights, they can't refuse to do so for gays. If you want to discriminate, you have to operate as a private club business, and serve only members. That's our "out" for those kinds of businesses. If you want to do business with anyone who walks in off the street, you have to do business with everyone who walks in off the street.

And yes, amusement park rides are discriminatory, but sometimes no reasonable accommodations are possible. The design constraints mean the passenger dimensions have to fall within a certain range, or the physics math doesn't work out. It would certainly be possible to have multiple types of passenger vehicles and restraints, but it also complicates the operations, because you then have to sort passengers by size before seating them. The scope of reasonableness is subjective.

In the case of airline seating, the reasonable accommodation for ranges in height would be to reserve some seats with more legroom for tall people, and some seats with less legroom and lower seat height for short people. Height is normally distributed, so the tradeoff would tend to work out on average. But that would interfere with airlines' fare categories and gratuitous seat upgrade fees.