[bumbada]

You train them. If you let people take advantage of you, they will take advantage of you, of course.

Most of the time is not on purpose. Thinking how something should work (or using it once done) is way easier than doing it(hundreds or thousand times easier actually), so the only person that really knows how much effort something takes is the person doing it.

Because they don't know how much something takes, they don't value it. Specially if it is given for free.