So you'd prefer the railway not to advise customers when their train is retired or cancelled then?
In many cases yes. Silence is golden.
If there is to be a widespread rollout of such notification it needs to be an 'opt-in' service and not an 'opt-out' hidden at the bottom of a page (or off-screen as per Trainsplit).
Railways are not airlines with their generally infrequent service and unpublished timetables which are frequently altered at the drop of a hat. Ditto twice per day ferries from Fishguard or the Standard Gauge Railway in Kenya operating just three times per day, where prior booking is compulsory and would often be essential anyway as standing is not allowed.
Where the service is infrequent, and cancellation can have large implications on previous / post travel arrangements then yes, prior notice, as far out as possible, is a good thing. As per those examples above. In Great Britain services such as the sleeper or remote infrequent routes such as the West Highland, Far North or Heart of Wales then notification (and offering genuine realistic alternatives) may often be beneficial.
Where the train runs three times per hour and capacity is not restricted to the number of seats available then the need for notification is much less. Especially if you are on a flexible ticket and may catch 'whatever the next train is' anyway.
At the point of travel there already is sufficient information out there, on sites accessible to the general public, to advise of late running, cancellations, disruptions etc. The quality and usefulness of that information is a different matter "trains may be cancelled, diverted or delayed by 60 minutes" doesn't really tell the traveller anything.
People need to take some responsibility for their lives. That includes checking you have clean socks, whether rain is forecast and whether your trains are running on time before you leave the house.