Except when it isn't. Everyone else seems to get it. Sorry you're having so much trouble trying to grasp it. I guess they didn't dumb it down enough for you.
Everyone else is adding their assumptions to the film and everyone else are also fans like you have a personal stake in defending it. As a critic I don't defend I just show the contradictions, the lack of necessary information and the poor development of plots and characters. The movie is already sufficiently dumbed down so that individuals can interpret it just the way they want to.
Abrams had one goal, to bring in money for Paramount. He did that by stylizing Star Trek, flashy, big, explosions simple made to be beaten bad guys and lots of unnecessary or irrelevant scenes that entertained but didn't tell much of a story or rather. And while those scenes were nice touches because of time constraints the necessary parts are sacrificed for the entertainment. This is designed to entertain the masses...not to tell a well thought out story and definitely nothing educational involved.
He well succeed in the Dumb Category.
How do the two quotes contradict each other at all? Mind you (and this is the state of our system today), but for one reason or another, there are over 5,000 PhDs in America that work as janitors. For the vast majority of them, it's because of the poor job market. Some of them may have just become disillusioned with their degrees or wanted a career change and sincerely joined that line of work. Still, it's honest labor, a seemingly simple job, and those janitors just happen to be quite brilliant.
He chose honest labor.
It didn't say he aspired to be more but couldn't because of economic failures. That's the contradiction in character.
We have an individual that is ,for all intents and purposes, portrayed as a thug maniac. Perception matters in story-telling. The prevailing stero-types matter. In stories you don't just show a walmart cashier that knows knows how to calculate quantum physics . There is a story there, don't just leave it to (well it's not literally contradictory) That's LAZY.
When movies or stories display societal norms like Cinderella it's often for comparison of differences. The highly educated are often thinkers, the under educated are workers. Khan was setup as highly intelligent. Nero wasn't set up at all they gave him tattoos and a mining vessel and he was EXTREMELY STUPID...
So yes it's out side belief that this individual who got himself killed because he put a Star Fleet Officer from the Future that had developed an incredible new technology to swallow black holes on a planet within walking distance of a Federation Outpost.