We are not being honest if we say its not a stressful job. Being in charge of the safety of several aircraft at once, thousands of passengers, can be very stressful. Just compare what the result of a mistake is for a controller vs a mistake at your current job. Also look at the importance placed on breaks for ATCs.
Add to that, some of us trying to get into the field already have well established careers elsewhere. Once we go to OKC, there's no turning back. Failing out or finding out this career path is not for you could mean the old job is no longer there, having to take a paycut, working a different job you hate, or being unemployed.
Burger King jobs are a dime a million. Yell at a customer and get fired, there's 30 other fast food chains willing to hire you. Leave ATC and probably never get hired again.