> As far as I know some companies charge more for seats near entrances where there's more space, so people are willing to pay more

In my anecdotal experience, the people complaining about leg room are precisely those who are not paying for additional leg room. (Similar to how people who compare modern air travel with service in the 1960s aren't purchasing the inflation-adjusted equivalent ticket, which would almost always be a lay-flat seat today if not Wheels Up.)

I may be the exception, but as someone who's 194cm tall I am both paying for more legroom and complaining about legroom.

Airlines aren't paying inflation-adjusted equivalents from the 1960s for their expenses either.

Google flights does - at least as well as they can base don the airline and plane. They'll also compare this to the average. All airlines charge more for exit rows and their extra legroom, typically as "premium economy" seats.

Premium economy is usually separate from exit row surcharges for economy class seats. Both are also relatively recent trends and I am not so sure that all airlines have caught up to the exit row squeeze.

> As far as I know some companies charge more for seats near entrances where there's more space, so people are willing to pay more.

Unfortunately those prices are usually not even close to proportional to the additional space (and even that would ignore that seating space is only part of the service).