I guess the thing is, if you have to do the three hour round trip, you do it. You just grit your teeth and get on with it. But at the same time, I also think it is OK to find it a bit grim.
If you do a 9-5 day, and end up working a bit later (say to 6, which for some work cultures isn't late at all), then that's 12 hours out the house for work. If you want 8 hours sleep, then that's 4 hours to yourself in the evening. If you're a nurse working long days or another long shift worker, then that could be 14/15/16 hours outside the house. If you do shift work, that probably pushes the travel times up. I know that for some people that level of free time is a luxury, and there are also people who despite being near work, do several jobs to make ends meet. Obviously commuting is nothing in comparison to that. But it still isn't ideal, and I can totally see why people would want to avoid it if possible.