Bad journalists do. The good ones quote/link their sources. You can do the general idea of journalism in many ways. (Tabloid writers are journalists too... in theory)
And where does one find this ‘good’ journalism? It seems to be the exception rather than the norm as majority of the articles are summarizations, opinions, rip offs from reddit, clickbaits that quote from ‘experts’ or ‘sources’ who or not named
My impression is that most news now is just reported by a single source or a wire service, and 90+% of sites just write their own article based on that first news site's article.