Not really you buy a ticket for a specific train in the knowledge that that ticket allows you to get on the train printed on the ticket not any old train you feel like, the ticket collector was well within his right to ask him to leave the train and wait for the one he'd actually bought a ticket for.
You wouldn't buy a ticket to fly from Birmingham to Edinburgh at 0850 and decide to use it to try and get on the 0750 and get bent out of shape when they told you to do one would you?
You also wouldn't turn up at a hotel a week earlier than your booking and demand they gave you a room because "Well I've paid for a room and I want it now not in a weeks time"
Both of which are completely different, since both flights and hotel rooms are booked to take into account the number of people flying or staying. So if you tried to get on a fully booked flight without a ticket, you would be taking the place of someone already booked on that flight. If you tried to take a room in a fully booked hotel without a booking, you'd be taking a room from someone else booked into that hotel.
The fact you can buy open tickets for trains means neither of your examples are relevant. By Kindai getting on that train instead of the next one, he wasn't preventing anyone else from getting on, the only "reason" it's against the rules is greed.
I'm all for having rules in place for a genuine reason, but when it's something as arbitrary as "because we said so", then I don't tend to agree with their existence, especially when the party making the rules seems to have very little regard for keeping up their side of the agreement.
