Nothing Good or Bad, but Thinking Makes It So
Even Conan Doyle had his character Sherlock Holmes seek refuge from boredom in drugs. How many animals get bored? Or commit suicide? I've never heard of any. (Cats with catnip and/or laser pointers fall into the drug category, I think.) Cults -- someone else does your thinking for you. Everything you do, say, wear, is prescribed. No thinking. Ah, but you do have to pick your cult first! But once that is over you can coast, as long as you avoid worrying about whether you picked the right one.
This need to channel thinking cycles could also explain the popularity of TV shows, crossword puzzles, and sudoku. Which I would definitely advocate (yes, even the TV shows) as a healthy, socially acceptable alternative to scrambling your brain mentally, physically, or chemically.