I reject the position that a candidate must know absolutely everything to be qualified to run. We have some of the dumbest people in America in Congress right now (and possibly the single dumbest person in the WH). I much prefer the candidate that has an idea/goal to work towards that is willing to listen to constituents on how best to get to that goal and is willing to listen to experts to learn more about that policy goal.
Also, it is undisputed, scientific fact that young people are better at being adaptable, applying new ideas, and not being stuck in me mindset. I don’t really care if Ocasio-Cortez doesn’t know something as long as she is willing to learn about it and use that knowledge to improve things for her constituents and America as a whole.