Someone will always find a person who has ctb, but if matters are arranged correctly that person can:
- Be prepared and know what they will find
- Be a professional who is used to it and/or trained for it
- Not be involved in the actual death
- Not have to witness the actual death play out gruesomely in front of their eyes, while they are nominally at the controls, but in fact powerless to do anything about it
Analogy: imagine people used trucks more often to ctb instead of trains. Should every truck driver be fighting fit, just in case? We already have a shortage of them - train drivers too, in fact. Or not even trucks, how about just random cars. Is that okay?
Anyone ctb in front of a train should well be able to forsee that it will have an effect on the driver. Including heart attacks, sure, why not? There are heart conditions that won't show up in a physical, it's not unheard of to die of a heart attack at a young age. Or crippling guilt, leading to a decline of whatever sort you might imagine. Maybe we need all train drivers to be psychopaths but it's not currently a job requirement.
Wild that anyone could pretend this isn't true. CTB is a right imo but let's be honest about this particular method. I won't say that a desparate person is evil for this. In fact I had some serious attempts like this myself. But I'm not gonna sit here and pretend that, if I'd been successful, the driver should have just brushed it off as another day at the office and it's their own fault if they didn't.
I'm gonna put a hypothetical conversation between a train driver and his wife under a spoiler here. It's tasteless as fuck (which is the point) and not for the faint of heart, but if anyone isn't convinced about what I'm saying they can read it and think about whether it's actually plausible in all but the rarest cases.
'How was work honey?'
'Oh, nothing much happened really. Oh actually yeah, one thing, I almost forgot.
Someone jumped in front of the train and became a red water balloon! Bits flying everywhere, you shoulda seen it. We needed the windshield wipers for that one, I can tell you! Hehe. Anyway, what's for tea?'
^ Maybe 1 in 10,000 people are genuinely capable of this kind of mindset, and I'd expect most of them are in other lines of work (or prison) ^