Don't say that to a truck driver, construction worker, farmer, or fast food employee.
> Using your body exclusively it can be tiring indeed, but at the end of the day, you will have a nice shower, eat and rest well, and the next day you will be good to go; whereas with using your mind exclusively can be so dangerous in so many ways!
Going home at the end of the day and not having to think about work is sure great, except that fast food employee is probably doing their second job. As for that farmer, in one respect or other they're almost certainly operating their own business. Not managing. Operating. They're going to have trouble setting aside the stress of the job at night as well. Construction workers, well, they will be all over the map. Some will be like farmers, operating their own business. Some may be doing heavy or dangerous labor. Day to day, their job may rank as tiring. Over extended periods, they are expending their body. Short of switching to a trade, their career is on a clock. Truck drivers have their own issues to deal with. Again, a lot of them are operating their own business (even when the work arrangements make it feel like they're employed by someone else). If they're working within an urban area, they're typically driving in less than ideal circumstances for hours on end and dealing with a system that tries to make the system's problems the trucker's problems. Some long-haul drivers may earn a decent paycheck, at the cost of being on the road for days on end and being pushed outside of the safety envelope.
So yeah, everyone has something to complain about. But if you want those people to think that SWE's are arrogant jerks, then just go on saying how much worse your job is than yours.