The problem is that there are a lot of people who don't organize themselves, and need some sort of structure. So maybe they're not so suitable for agile development, and maybe you shouldn't hire them, but that really limits the labour pool, and in the end, someone is going to hire those people. We still need a way to make those people productive.

And they should be hired; they're often perfectly competent programmers, testers, etc, just not so good at working effectively with this kind of agility.