I think it has to do with the perception about "the bigger the better"
For example,one of my friends when he saw the VX he replay : Gus,that buggy is terrific,but too small (he drives a 2007 laredo)"why didn't you bought a bigger truck ? I think is "better"
He didn't ask me about how the VX perform or if is dependable more than "it's too small"
The manufacturers actually rushed that perception into the comsumers & dropped any future 2 door project probably to safe money on the long road leaving the customer with no options more then : You take it or leave it
If we all look at the current market you can find almost all manufactures producing two doors sport cars (i.e) Ford,BMW,lexus,infiniti,chevrolet,honda,nissan,dog de,etc because sport cars is perceived to be build for the singled/very independent/whatever you think/who cares/free kids/i'm not a baby mama individual although a coupe SUV can do the same job & falls into the same category

Beside all that the SUV has being showcased as the "family oriented" vehicule,you can prove your self that by looking at the TV adds the way how they shows you a whole family on board of a SUV & the single guys friving around. On his V8 coupe.
This perception has condemmed any 2 doors SUV as the nemesis of a SUV's main purpose.

Can anyone recall which is last two door SUV (brand,model & year) on the dealer's show floor ?