That's very true, but there's room for some nuance. Because of author inexperience, I wouldn't expect audits and reviews to be comprehensive, but I would expect the questioning to take place. In the case of imports, it doesn't take years of experience to verify that the versions added are latest stable and to generally check out release notes / issues. It's far from enough, but it's something.
Also agreed on the cheaper-to-write bit. Trying to redeem piles of slop into something workable is a fool's errand.