Not true. I can record a segment of game with high movement both in engine on the PC and with a camera at 960fps and go through both frame by frame to verify that the game rendered 144 separate images and the monitor displayed 144 separate images and they match. Half of them are not black frames inserted or any other rubbish.
There are already videos up on youtube that show the comparison of 60/120/144 etc.
Yes an LCD has slightly slower response times than oled, but that is not anywhere near being able to say that LCD is not capable of 80/90/144hz, its just nonsense and bullshit.