I think you're applying a very ungenerous reading to the parent.
The parent's argument is exactly the same if we change "giving people food" to "giving people who have food that isn't suitable for them food that's more suitable for them".
Maybe you think that the parent's argument is flawed because you think that all people have the same basic educational needs. That's what TFA is arguing is not true, but maybe it's wrong; you could make that case. But quibbling over the exact formulation of an analogy is not the kind of concrete thinking that you're asking for.
The parent's argument is exactly the same if we change "giving people food" to "giving people who have food that isn't suitable for them food that's more suitable for them".
Maybe you think that the parent's argument is flawed because you think that all people have the same basic educational needs. That's what TFA is arguing is not true, but maybe it's wrong; you could make that case. But quibbling over the exact formulation of an analogy is not the kind of concrete thinking that you're asking for.