One of the major things code review does is prevent that one guy on your team who is sloppy or incompetent from messing up the codebase without singling him out.

If you told someone "I don't trust you, run all code by me first" it wouldn't go well. If you tell them "everyone's code gets reviewed" they're ok with it.

Everyone is sloppy sometimes. I wonder if what code review does is prevent velocity (acts a a brake) so that things dont change too fast (which is often a good thing).

You don't get paid for features or code shipped. People don't pay $200 a head for fine dining based on the number of carrot chops or garlic crushes. The chops and crushes are necessary but not what you should be optimizing for.