While that's true, I think it's equally likely in the current market that if Lexus didn't have the NX and RX many of those customers would just go get a similar CUV from Acura or Ze Germans.
That's definitely true. The SUV craze is so intense right now that Lamborghini even made a SUV. The NX and RX is there to get that intense SUV market share for sure. Lexus is doubling down on SUVs too. They are going to add the UX and just trademarked LQ - which many believe is their high-end crossover model. The down side to all of this is - the IS, GS and maybe even LS (if the LQ comes out) will get the short-end of the stick.
Its just unfortunate that cars that are geared towards enthusiast tends to just sell less.