If I had to make a guess, it is for the same reason that people will pay more for free shipping: they simply aren't doing the math. Of course, there could also be other reasons, things like people valuing their free time differently. Just because your employer is willing to pay $N/hour doesn't mean you are losing $N by waiting in line for an hour.

> Just because your employer is willing to pay $N/hour doesn't mean you are losing $N by waiting in line for an hour.

Most people do nothing with their time. You're not being paid to watch TV or play video games. Learning is perhaps the only thing that pays, and it's not cash nor immediate.