The hypothetical, lower-spec, VA35F powered LC250 I threw out there would probably make them some cash. While it would cannibalize sales from Toyota's SUV trims, it would also cannibalize sales from Bronco, Jeep, and fullsize pickup buyers as well. Basically a reasonably-priced SUV that can wheel and has 75-80% of the towing/hauling capability of a fullsize pickup, for about the same price, but with Toyota build quality. This would be a more versatile vehicle than a Jeep/Bronco (which are, let's face it, purely toys/status symbols for most and aren't really great at either daily-driving or "utility" use), without having the size/bloat of a fullsize truck, or the cost of a GX550/LX600. No other automaker makes anything like that in the US, but Toyota could easily make it if they wanted to (note: you could say the Sequoia falls in that bucket, but IMO the wheelbase and size make it too big to be good at wheeling on tight trails).
I'm sure they have their reasons as to why they are not doing that (CAFE/emissions, production capacity, market/consumer modeling, or just them wanting to make people buy-up to the high trim models). In the absence of that type of rig, folks like me will just continue to pick up GXs on the used market once their prices drop.