Go back and watch films from the early 70s - the comedies are farcically stupid and the serious films are violent and paranoid, because between Vietnam, Watergate, and other political issues, its was a tough time and people were angry, disillusioned, and pessimistic. Spielberg's first commercial film
Duel is a very fine piece of cinema but it's far from being 'fun.' Likewise Lucas' early work like
THX1138 or
American Graffiti is shot through with anxiety about the future and lost innocence. Hitchcock could do great screwball comedies but he alternated them with nightmarish vortexes on taboo subjects.
What you want are optimistic films where people get into trouble but keep their sense of humor and eventually bounce back. That requires a social and cultural environment, and a showbusiness industry, in which people can do the same. Have you heard many stories lately where a talented director goes way over budget or even bombs but makes a great comeback because people are forgiving and want to support a real artist? You have not, because the arts are heavily professionalized these days and computers have made accountants very powerful.