A lot of people don't also seem to understand the importance or care for colour temperature (Kelvins)and pick horrifically cold LED lightbulbs for usage at home, it is pretty obvious when I walk home and see people's living rooms lit in a very harsh cold light.
I have noticed the same thing, but I suspect they mostly
do care but can't muster the mental effort to understand or alleviate the problem. I find it takes close attention to the small print, plus some degree of "sixth sense" for identifying and compensating for accidental inaccuracy or deliberate mendacity in manufacturers' descriptions, and if there is a picture of the thing working also some understanding of the deficiencies of photographic colour reproduction processes, to attain some reasonable degree of confidence that I am actually buying what I want; and even so the only truly definite knowledge is that gained when you put juice through it. (This is part of the reason I make my own LED bulbs: buying a batch of naked LEDs which turn out to be wrong wastes a lot less money than buying an equivalent number of incorrect complete assemblies.)
I think the correlation between rail enthusiasm and the ability to coherently analyse and articulate one's dissatisfaction with lighting quality does not so much reflect whether or not someone cares, as whether or not they are happy to nerd on about it and pay scrupulous attention to lots of arcane details when making an everyday purchase of a commonplace item.
I have encountered plenty of people with no affinity either for railways or for nerdery who nevertheless moan like billy-o about the disappearance of incandescent bulbs, and do things like laying in a massive stockpile while they still can or ferreting out suppliers of bulbs for "industrial" purposes which the regulations still allow. When I suggest that it would be better to simply pay enough attention to what they are buying to choose LED bulbs which are not horrible, they react with dismissive scorn and refuse to give the idea the slightest consideration.
Before that it was CFLs taking a long time to attain full brightness (so find which models do and don't do that and pick the ones which don't) and before that it was full-size fluorescents being cold and flickery (so pick tubes with a warm and long-persistence phosphor mix). Same reaction in both cases: scornful dismissal to the point of denying that the versions without those defects even existed.
People certainly do care; it's just that the non-nerdy majority would rather follow the brute-force approach of hunting down incandescent bulbs because they're all the same and you know what you're getting without having to think about it, instead of figuring out how to find out what you're getting with the alternatives.
I also believe it's pretty well scientifically established that most people in general do prefer warm-coloured lighting, even if a few don't. Which makes sense, since there's a powerful influence from the relation between the colour temperature of daylight and the weather. It's only natural that people should mostly prefer lighting which more closely resembles nice weather.
So I do think that lighting quality on trains is relevant to the general public - ditto other so-called "minor" factors under the general heading of "thoughtfulness" which affect how welcoming or oppressive it feels to travel on the railway, such as flickering displays in the corner of your eye or seats not lining up with windows. And we
know it's not just nerds who object to constant barrages of announcements. I don't think it's appropriate to dismiss such concerns simply because people on here can happily go into detail about them rather than lumping them all together into a general feeling that trains are kind of yuck.