system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: it’s discriminatory to have tall people pay extra for a physically comfortable flight

I’m in the process of booking flights for my upcoming holiday. It has always bothered me that as a 1.95m (6’5) tall individual wanting to have a comfortable flight I’d basically always have to pay extra (€350 for 4 flights in this case). 

Just imagine people having to pay extra for their flight because they are brunettes, have blue eyes or big noses. That would cause a lot of consternation. Why isn’t it the same now?

I can’t change anything about the fact that I’m a tall person, what’s the difference here?
gpt
The difference is that you are taking up more space, which is a limited commodity on a plane.  If everyone on the plane was a brunette you’d still have the same number of tickets to sell.  If everyone wanted comfortable 6’5” legroom, there would be fewer people on that plane.  

It sucks that it is something you didn’t choose and can’t change, but it is a thing that has a direct bearing on what you are purchasing so charging more isn’t discriminatory.  Especially since you aren’t getting charged a “tall person fee” you are choosing to purchase a different ticket that is an upgrade that short people also value.