You forget existentialism has a clear definition of angst, despair and inauthentic living. That tie into what is "good" in existentialism. Essentially existenti

You forget existentialism has a clear definition of angst, despair and inauthentic living. That tie into what is "good" in existentialism. Essentially existentialism says yes happiness is good, but happiness supplied by drugs is an external source of happiness and is thus inauthentic. Poking yourself with needles, ie the act of consuming doesn't make you feel good, the drug does. Existentialism is in this respect where Eastern philosophies meet with the West. Read some Camus, or Sartre, but if you feel the need to see what existentialism is like with a higher power read Kierkegaard.