It seems that when speaking of health it is usually in the dative (eg ihm ist schlecht) while being bad is nominative. Also I think context helps. You wouldn't say "I'm never calling that handyman again, he was so sick" - unless I guess he was coughing on you while fixing a leaky tap?
Well, handymen and artisan are two very different things, although I can see where you would get them mixed up. A handyman usually works with repairs: a broken pipe, tiling a new roof, a broken dishwasher, a broken dryer, putting in tile in the bathroom, etc. Artisanry isn't practical repairs, it's an actual art. Artisans sculpt pottery, paint, craft decorate steel, blow glass into beautiful bowls and pots. They both work with their hands, but one is more practical and one is more artistic.