Having had a lot of experience myself, I sadly can't echo this. A lot of it has to do with stick-and-carrot incentivization, stack ranking, and other stuff.
Unfortunately every place I've worked at sort of accidentally pits their programmers against each other in a sort of "who can get it done first" competition, with those who do a quick-and-dirty job getting credit, and those who clean up their proverbial workbench getting none. We've had gentlemen's agreements to not do this, and have even been able to collectively oust (i.e. get fired) a few serial violators, but there's just SUCH pressure to ship quickly that code review is basically a fictional thing like the flying spaghetti monster.
It's telling that we've got a MLOC codebase, and basically not a single piece of documentation - and every single place I've worked, in almost 2 decades, has been exactly like this.
Enterprise software is a wild ride. :|
