This isn't true whatsoever, you make it out like the brightness capability is something bad when it's absolutely not. That's an inherent advantage of LCD, the ability for the backlit LED's to reach a level of luminosity simply not possible with OLED cells.
Another thing is that LED TV's are close to parity with OLED now in terms of black levels. Full array has added so many zones it's basically just as good with all of the advantages of LED with none of the disadvantages of OLED. Micro-LED matches OLED at an imperceptible level again with none of OLED's disadvantages, literally mi