Check your able-bodied privilege, please.
I'm far too disabled to be able to do a FOUR-HOUR commute every single day, and no reasonable person would suggest that.
People are very keen on going "well but but but it's only an hour by train!" Yeah, if you live directly next to the train station, and work directly next to the train station on the other end. In reality travelling to and from both train stations can easily add an hour to your journey.
For one thing, properties right next to mainland train stations that have direct trains to London tend to be very expensive for that very reason. You probably wouldn't be able to find something within easy walking distance of a train station with a direct train to London cheap. That means you have to add on an extra half an hour or more to wait for a bus to get to the train station, and that's assuming these places have good bus service.
Second, London is massive - the commute from the train station to your own workplace could easily be an hour.
I just checked, and trains from London to Southampton are 2 and a half hours, unless you pay for the much more expensive fast train. And even the slow train is very expensive. So if you miss or can't afford the fast train, that's a bare minimum of five hours, but probably more like 7 hours commute every day.
Fundamentally, it's not reasonable to expect people to commute at least two hours every single day forever. It's just not. You wouldn't have any quality of life that way, and it assumes that everyone is able-bodied, so again disabled people get shafted.