Something I don't think anyone has mentioned yet is that there are many people out there who need to use the train but genuinely can't afford the fare. Working people with low wages, high rent, extortionate bills and cost of living gone through the roof while already low wages have stagnated. If someone is already reliant on food banks to feed themselves and their family and is absolutely cr*pping themselves about what their energy bills are going to be this winter, the last thing on their mind is going to be paying an expensive train fare when there's a very high chance nobody will bother checking anyway. Some of these point blank refusals to pay are because people are genuinely totally skint, but if they don't use the train to get to work they'll be in an even worse situation. I'm not saying they should get a free pass but they do deserve a bit of sympathy.
Being poor might well be deserving of sympathy. It doesn’t excuse criminal activity, though.