The issue is how capitalism works. No one wants to pay a 1000$ for a domestic flight, but that's the only way you're getting personal space. Flights in the past were expensive, but comfortable.
It's not a right to have space and affordability.
It's not a right to have space and affordability.
Most airlines do have a Comfort+ that is pretty affordable and allows you more room and a better seat.
So, you can already do what you want (get leg room and comfort for $1000 or less).