If you want to get stuff shipped though, you need a good engineering culture. If you want to move fast you need experienced people. This feels like the argument against automated tests. "It'll slow us down!" So will debugging the slop your coworker thoughtlessly tossed in without bothering to see if it will work!
(I harp on the "experienced people" thing because I see a lot of startups that seem to be 23 year olds vibe coding. That hits a brick wall fast.)