You can have all the policies about "protection for customers" you want . If a tree takes the wires down and they're trapped on a train in the middle of nowhere miles from an access point and hundreds of miles from the nearest loco that can pull it away you are as good as stranded anyway.
In this incredibly rare set of circumstances (in terms of % of trains run vs % of trains ending up in this situation, we must be nearing 0.01%, even on a disrupted day), I think most customers would sympathise and understand. It won't be perfect for everyone and will likely be uncomfortable, but these 100(ish) stranded customers are more than offset by the many thousands who can get home.
Even if you manage to get the train to a point that it can be evacuated if you then have difficulties sourcing onward road transport you are again as good as stranded. We've seen some fatal and serious incidents today on the roads as well.
Which are the exact roads those thousands of rail passengers end up on when you remove all the trains.
What then ? Put everyone up for the night . That's not going to be good enough for some passengers and depending on where you are won't be possible at short notice anyway . Again realistically you are again as good as stranded .
In fairness its usually possible for the minority of customers who can't just go home. There will always be a handful and the TOCs should make provisions for them - indeed, this should be enshrined in your rights (and usually is, except when they pre-cancel). Realistically, the bulk of customers will make their own arrangements as a long wait for a possibly mediocre hotel room really isn't all that desirable, but it's better than nothing.
The messaging of "Do not travel" and if you have then chosen to do so we cannot guarantee your journey is really Just making passengers aware of the reality of the situation.
I entirely agree and support that.
I think people often misunderstand my position. I'm not saying trains should run, come what may. I wholeheartedly support what AWC, Thameslink, Northern et al have done today by introducing a sensibly reduced timetable to ensure service resilience and provide a level of service as long as they are capable.
What I don't support is a nationwide rail shut down (ie: Wales, Scotland on Weds), "just incase".