I'm a dyed in the wool stick shift person but know enough about autos that they all have enough ability to lock them into at least a couple of gears. Like preventing overdrive for towing, maybe starting in 2nd, locking in 1st for off highway. Otherwise I don't completely understand why having finite control in a truck is that practical in nature. If you wanted to shift all the time then buy a stick shift, otherwise let the machine do what you paid the money to have it do. In a sports car being able to up and down shift each gear might be an important thing, for the track.
I think the demographic exists for both in most places. Tacomas get imported into many countries I understand in South America like we do with 25+ year old trucks, for enthusiasts who like the more comfortable highway ride, power, more aggressive looks, etc. Just like here there's still a small number of buyers who would opt for a stripped down utility truck. It's a segment that is filled with poverty spec F150s and Super Duty trucks to some extent and others (like me) just buy a used Tacoma and build it down (steel wheels, taking out OEM stereo, inverters, etc.). I'd have happily bought a new(er) Hilux if it was available but I had to accept the reality that is. Toyota is above all not stupid, they know how to maximize profit so markets get what sells.