Brooks: I'm unhappy in my job, but I don't know whether I can accept the risks involved in quitting my job.
Conclusion
You might as well just quit your job.
Evidence
The only risk in quitting a job is that of not finding another job. And if you don't find another job, you'll be unhappy. But you already are unhappy.
Evaluation
Given that Brooks is already unhappy in his job, and the only risk in quitting is not being able to find a new job (which would make him unhappy), how could we argue that Brooks should not quit his job?
Well, Brooks only said he's unhappy in his job. If he quit and then were unemployed because he couldn't find a job, he would be unhappy with having no job. Maybe those are two different types of unhappiness and the latter is worse than the former.
Additionally, we were given a conditional that says , and then Morgenstern thought that was a moot point since Brooks is already happy.
But maybe there are other downsides as well to not finding a new job. Morgenstern didn't establish that being unhappy is the only result of not finding a job. Maybe other results would include needing to sell your car, losing your partner, and having to move back in with your parents.
Even if we assumed unhappiness is equivalent in this world vs. world where he quits, there might be other ramifications of quitting that make that world worse than this world.
Goal
Find an answer pointing out a meaningful difference between his current unhappiness and the unhappiness he'd get from not being able to find a job, or find an answer discussing other possible negative ramifications of quitting his job.