That is exactly my gripe with the lighting in... well, pretty much everything from the fluorescent-lit Mk 2s onwards. I don't want to be shut away in a coffin trundling endlessly onwards through a black void with no clue what's happening outside or where we are, I want to maintain my connection with the world outside and watch it go past. And you can still see really quite a lot if the interior lighting is dim enough not to limit your view to the unappealing sight of your own hideous physog reflected in the glass, and the person in the next seat bay staring at you all the time in reflection thinking you can't see them doing it because they haven't realised light goes both ways.
The old Mk 1 compartments with the "bright/dim" switches on the lights all set to "dim" were lovely cosy and relaxing places to travel at night. (And the unreliability of tungsten bulbs would often let you choose a compartment where some of the lights weren't working at all, or you could even take the bulbs out yourself and put them back when you got off.) Doing the same route with bright lights glaring YOU WILL STAY AWAKE, YOU WILL STAY AWAKE at you all the way in Guantanamoesque sleep-deprivation style is not relaxing, and means getting off the train feeling even more strung out than when you got on.