Watched a buddy snap a bolt on his valve cover because he was just going by feel. He had to buy a whole new gasket set and lost a weekend of driving. That click from a torque wrench is such a cheap peace of mind.
Honestly, how many people actually get their torque wrench checked and calibrated? I've seen guys use the same one for years and just trust the click. Watched a guy at the shop put wheel lugs on with one that was way off, they were way too loose. Feels like you need a second tool just to make sure the first one is right.