Steel yields gently so most people have learned to tighten things until they feel the bolt start to yield, then stop. With aluminium that's harder, and with carbon it basically doesn't happen. You need to be careful, ideally use a torque wrench, and always check for cracks in your carbon bike.
A friend was "helped" by someone a while ago and their carbon MTB now has a crack where the seatpost bolt does up. It seems to be ok and they know to watch that area. But I'm ok with it because when it does fail... the seatpost drops and couple of cm into the frame and gets loose. That's pretty survivable.
Said friend-of-friend also helped change the oil in their car. Overtightening an oil filter is much less survivable (for the car). Filter split, oil everywhere, had to get towed to service centre and replaced. Oooops.