If you live in an area where there is no railway provided, it’s unlikely to be directly relevant to you. But where it is provided it’s regarded as essential, and is key in areas that make a significant contribution to the wider economy, so it will be indirectly relevant to anyone who uses any form of public service.
Actually I live within sight (back bedroom can see the platforms) of a major junction station, 20 minutes walk away. I have a wide range of people that I interact with in the town, and really I do not think the railway is seen as 'essential'. A nice to have, an inconvenience at some times if it is not there, but nothing like the Health service or the Fire Brigade or the Supermarket. Not that I am suggesting that the railway at this location should be closed, but I certainly do not believe it is providing value for money for the subsidy it is getting. I accept that there is a corner of the country where the railway is more entwined in the life of lots of people and would cause much more inconvenience if it wasn't there. Even in that area, once the dense suburbs have been passed through, there is plenty of reliance on private transport for most journeys.
Most of your posts on these subjects (and others) align with a right-of-centre-small- government stance, yes. That is not meant to be an attack; I know plenty of people with similar views, but I’m not sure someone admiring Ernest Marples is representative of the mainstream!
I invoke the name of Ernest Marples as a politician who tried to grasp the railway financial and modernisation problem. The country needs another politician to do that. Not exactly the same character, just someone with vision and stamina to see it through. The issues then and the available remedies then were not the same as those now. I am not suggesting wholesale culling of railway lines (after all, that was done in 1963) [culling of lines is always raised as the ogre by enthusiasts and railway staff anxious to protect nostalgia and their jobs/working conditions]. As in 1963, the railways are desperately in need of modernisation. There are difficult decisions to be made for the sunlit uplands of the future. There are new lines required. There is electrification and other modernisation required to reduce costs, carbon footprint, improve productivity and reliability.
“Ballooning subsidy disappearing down a rabbit hole” is something of a value judgment, seemingly with no acknowledgement of any wider benefits that subsidy is buying. Governments of all flavours since the 1980s have realised the importance of the railway, albeit the last one less than most. Although the longstanding policy of placing more of the cost of the system onto fare payers is certainly continuing with the current government and this budget!
I am not suggesting that the railways should run without subsidy. There are good reasons to pay some, and some reasons not so good. Either way, the subsidy must represent good value for money, which I don't think it does at present. (my opinion of course, lest anyone think otherwise)