That's why I said the first reason was presumably more important. The amount of truly elastically-timed trips that can be bought at the last minute is pretty small (but not zero).

The realism of prices is not the point; the numbers are illustrative only.

And an empty seat is only lost revenue if, by pricing it at $1200, you don't sell 3 $1200 tickets instead of 2 $2000 tickets. If you could somehow target prices more individually and sell 2 $2000 tickets to people who just have to go, no matter what, and then the additional $1200 ticket to somebody who kind of wants to go, but not at $2000, then, yes, you should sell the $1200 ticket as well as the 2 $2000 tickets. If you can't discriminate and have to sell them all at $2000 or all at $1200, then no, you shouldn't price at $1200.