>>faissa+Am
"still"? Do you mean you've had that lack of understanding before, not thought of any possible explanation, and then continued to not understand but be interested enough to post about it online? Surely even the briefest attempt to imagine a reason would come up with "they might use the computer to cheat" or "it's too expensive" or "they'll play games". Since they seem obvious, if you excluded such a possible reason, maybe you could mention that in your post so people don't unhelpfully tell you.