This is something that has been bothering me for some time as well, even though I have been fighting the urge to blame all of it on Akio for a while. But it is hard to ignore the evidence that supports the theory that Akio's only true goal with Toyota as a company is to flex as a rich kid and shape the company in his own image that he wants to sell the public. He is not selling Toyota, GR, or Lexus to the public- he is selling himself and how much of a "badass tough guy" he is.
The GR GT is kind of a perfect encapsulation of all this. Akio wants to put more emphasis on motorsports because he thinks it makes him look cool when he dresses up in his racing cosplay and runs laps for the camera. He had the GR GT built with racing as its first priority, consumer accessibility be damned. He had an expensive racetrack built for himself so he could have a "Nurburgring at home" to play with, under the guise of it being a testing ground for Toyota. And at the press conference for the GT GT, he finally admitted what we all knew but never wanted to speak out about, which is that his greatest upset at the LFA is that it wasn't named after himself.
The above may be a bit reductionist and simplifying certain details, but it also explains why there has been such a seismic shift at TMC where a car that has a jiffed up hybrid system that only exists to meet a bare minimum to be sold to the public is now going to launch an entirely new brand on the same scope as Lexus while potentially costing half a million dollars. It's not for you or us - it's a token for people who are committed not to Toyota, but committed to Akio himself.
What made the LS400 so great was that it was a product where Toyota truly put the customer first, going so far as sending their employees to live in the US for almost a year and observe the habits and lifestyle of their targeted consumer for the car. What made the LFA so great is that it was an engineer's dream project where money was no issue, and the end goal was to create a car that demonstrated the very peak of Toyota's engineering at the time, and with exotic materials to boot. Meanwhile, the GR GT... exists so Akio can pose next to it with his race team on Instagram while cosplaying as a race car driver.