Depends. Partly on the individual, partly on what he is doing.
Some people use nothing but hand tools, out of choice.
Some use hand tools because that is what they have, and/or can't afford power tools.
Some are simply in locations without power available.
Some use just power tools, out of choice.
I think most use both. And a hammer is not a power tool, except in the sense it takes human power to use one.
I learned with hand tools, and started shop class in the fourth grade. That was in a galaxy far away, and long ago. Didn't start using power tools until the 9th grade, and that was only a combination belt/disc sander. Managed to lose the fingerprints on that thing, but no blood. Tenth grade we were taught to use all the power tools. Anymore, regardless of my preference, I am pretty much restricted to using just power tools, with the quick odd job with a hammer, coping saw, etc., tossed in My joints are quite diligent in telling me that they are NOT happy with much hand tool use, and my back chimes in when I stand in one place for more than about a minute. The however is, I should be able to do chisel and carving mallet work on four Tikis, with no major issues, because I'll be sitting down, the carving will be no major issue, and I can just lean back and take a break at any time. It won't all be hand work tho, I'll start out the normal way, with a chainsaw. Hehehe
"It ain't what you're told, it's what you know." - Granny Weatherwax
Fawkahwe tribal police SWAT Team
Some days, the supply of available curse words is insufficient to meet my demands.
.....Call me a craftsman, artisan, or artistic, and I will accept that. Call me an artist and you will likely get a quite rude comment in return. I am not a @#$%ing artist.