I would disagree. I use frameworks because (a) they save me loads of time and (b) I already know how all that garbage works anyway. I know how HTTP cookies work

I would disagree. I use frameworks because (a) they save me loads of time and (b) I already know how all that garbage works anyway. I know how HTTP cookies work; I have no desire to implement sessions myself because they're a waste of time and, frankly, proper cookie handling is a pain in the ass. That being said, I know programmers who don't know SQL outside of an ORM, and if it hasn't bitten them in the ass yet, I am very confident that some day it will. I'm a hacker in that I will occasionally write my own http client or something like that, just to learn a new language or networking engine. I'm a professional hacker in that I'd just as soon use one already created by a competent person (or persons) and use my time to write something more interesting. The mantra of "good coders code, great steal/reuse" has, for my entire career, more or less proven to be true.