Not sure how familiar you are with the airplane industry but nothing is ever "100% due to human error" in these events. We know humans are controlling these planes and the equipment can always gets better. Usually it comes down to UX, checklists and more to have multiple stopgaps to prevent issues. Just a quick scan of the Flight 522 page shows there were in fact many UX issues like why can you take off when the pressure system is turned to manual? Forcing a manual override if so would have helped. Same alert sound was also used for "take-off configuration warning" and "cabin altitude warning", leading to the pilots making the wrong decision. Attributing Flight 522 to only human error is not what the courts did (check the "Lawsuits and criminal proceedings" section in the page you linked) so not sure why you would.