Nope not calling you a liar. I am saying there is always a way to work at school. Maybe not 30 hours, but definitely quite a few hours. I wouldn't have predicted what I had to do, and I am saying I wouldn't do it again. I apologize for appearing to call you a liar. I didn't intend it to come across that way. For people I know that didn't work there way through college, the concept is as foreign preparing to preach a decent sermon from the pulpit.
Firstly, I did work some although at some points I couldn't (that is, a job with regular hours very much would have been flat-out impossible). I don't know how you can see your blanket statement as not inevitably declaring people liars when they tell you that their schoolwork took so much time -- oftentimes more than there are hours in the day -- that there was plainly and simply none left.
And secondly, what I (and my peers) ALL discovered is that not only did we not have enough time for working outside of school for money, but employers STILL expected us to have more points on our resume from open source contributions. The fastest any of the people I know managed to find a job out of the gate was 6 months, some as long as several year, after graduating. Even when I did get my first job there was so much ridiculously specialized knowledge in particular technologies that it really still wasn't enough to the point that I'd even agree they shouldn't have hired me for what they expected up front (basically full-stack programming).
On the flip-side I would also concede that some people wind up in more doable situations and I wouldn't second-guess that either. But your blanket statement still declares multitudes of people liars for what they will tell you that their experiences were actually like. Unless some government regulation passes that demands that instructors absolutely cannot assign a combined workload that infringes on a remaining 30-40 hours of extra time, it is arrogance to say that you simply know that everyone has it to give to a job (or whatever number of extra number of hours you have in mind).
I mean if your way of thinking about being all-knowing for people's situations is non-negotiable, then that's that. But otherwise, I'd offer for you to consider that this is exactly where the liberal monster comes from and why the conservative party is inevitably dying: "I won, therefore the game is fair" mentality.