>There are many people" is a useless platitude to any number of people who fall through the cracks.

And so too is "any number of people who fall through the cracks". For any given situation or context in which the vast majority fare okay at least, there will be a certain number who fall through the cracks (just as there will be some who do very well) and you can't design all the rules around a system to completely eliminate the possibility of falling through the cracks, or at least you cant without risking externalities that make some key part of it worse for many more people.

As a criticism of any complex system, pointing out unusual worst cases is usually little more than a sort of useless hand-wringing for the sake of doing so, unless one has a solution to propose.