And it also has to be done right. I noticed a small leak in my home that aligned with where a new vent was installed a couple years ago and I went up to confirm my suspicion that the flashing was installed wrong. And it was.
One of the better advances in recent times have been things that reduce "envelope penetration" because dammed if it is never ever done right apparently, even on brand new construction. Furnaces and water heaters venting via PVC through the wall seems to work out better.
It's the #1 reason I'd hire multiple home inspectors during construction if I ever have a house built.
