@pjf
Good work.
I'd think if backlights are expected to fail multiple times in one TV then designing them like room lights to easily replace the bulb would be obvious.
If most TVs reach their end of life without a single backlight failure then perhaps we would spend most effort on getting a very uniform blending of light from multiple "bulbs" inside them, and on mak8ng panels durable.

I've observed over decades car bonnet spaces going from difficult to work on to much more organised ...

@pjf ...as the likelihood of a catastrophic major component failure being the engines terminal event has come down.
Now we are abandoning things that burn and go bang and reciprocate, and I have some electronics in there and nicely made containers for fluids, and space and clips and clever covers.

I don't think TVs have quite got there, but it may not be long.
Or they might become walls. Change the light from the next room.