TOCs have finite resources that must be deployed in the most ecomonally effective way in line with their franchise agreements, and serve the most customers overall
This is a point that seems to go over the heads of others - in a thread where there's plenty of magical thinking along the lines of "why can't we just electrify a hundred miles of lightly used scenic railway so that there's a diversionary route from Preston to Carlisle on a handful of weekends a year".
Obviously people would prefer a direct train (I'd prefer a direct train myself), but this is the kind of simplistic approach that creates the mess of "everywhere must have an hourly service to Manchester Airport" which strangles capacity around Greater Manchester (or the suggestion that XC provide a direct link each day between each pair of cities hundreds of miles apart). But ensuring that a direct train service is maintained comes at a cost - additional resources/ maintaining route knowledge/ borrowing units from elsewhere etc. Simply giving people an open question of "should direct services be maintained" feels a bit pointless (since there are costs attached to this). Especially in this example where a coach up the M6 will probably get to Carlisle faster than any diverted train via Clithero.
The frustrating thing is that people seem to accept disrupting direct journeys, just as long as the people inconvenienced are (say) passengers from north Wales to London (or the majority of passengers on the northern WCML who have to be put on buses because the diversionary route can't cope with everything), just so
we can have a nice day out with unusual stock on unusual lines.
Or, put it another way... If the WCML is closed between Lancaster and Carlisle then how do you maintain a link from London/ Birmingham/ Manchester to stations at the northern end of the WCML as well as maintaining a direct service for Lancaster? Is it okay if the majority of passengers are put on buses, as long as there's
some token train service maintained (via the S&C)? Is this just a box ticking exercise? How many passengers on the Holyhead route do you inconvenience to give a minority of people a scenic jaunt along the S&C?
Where has anyone suggested that a railway closes?
I think it's standard Strawman argument, we must man the barricades and whip up some "resistance" (even if nothing is under threat - look at how hard it is to close a tiny section of unused line at Newhaven or Weymouth) - but I guess you need to try to energise your supporters by pretending that something sacred is being threatened - modern political discourse. Depressing!