A bootcamp doesn't guarantee anything; without the right aptitude and temperament the tech industry is just as miserable, with a side of failure if you can't keep your jobs.
And no, "excellent work ethic" isn't enough.
And no, "excellent work ethic" isn't enough.
While some parts of the tech industry are miserable, on average they are definitely overpaid as compared to nurses or even doctors in some countries. And there are plenty of non miserable places in tech, especially if you relocate. Some Europe software shops seem out of this world when compared to US gaming companies, some of which sound like sweat shops.