Here's a German automotive technician. He uses a impact wrench only to loosen nuts and bolts. He threads them back on with a ratchet and then finally torques to spec with a torque wrench.
I don't know about you, but I would rather trust a precision measuring instrument rather than a imprecise hammering device for reassembling just to save a few seconds that would cause problems down the road.
There's a YouTuber called "Curmudgeon Transmission" who is rebuilding a A140E transmission for a 1999 Toyota Camry. It's nice that he does list torque specs on-screen, but he tightens every nut and bolt with a 500 foot-pound impact wrench. He edits out the part that he uses the impact, but he...