So, we agree there's a problem. It's immaterial if the issue is in the school itself or in the students. The material fact is that the tool you're using (the current educational system) isn't having the effect that you want (imparting useful information and useful ways to think about it).
Say that I've got a polished, high-quality product, heavily advertised, easily available, and cheap. But: sales numbers are terrible. Is it the potential customers that are the problem, or is it something about the product? Put another way, is it more useful to fight against the nature of the customers, or to modify the product into something that will convince them to buy and use it?
If most people are unmotivated, I don't think it's reasonable or constructive to just say "all well, they should've just tried harder". I think it's more useful to assume that they aren't inherently slackers and diagnose and fix the problems in the system to improve the experience for the students and the outcome for society, overall.