You pretty much never find single hydrogen atoms. The binding energy is so much lower in the diatomic state that atomic hydrogen would rip more out of water molecules if it found any.
If you mean "on Earth," you would be right - but that is a very parochial view of the world.
Only a very small fraction of all Hydrogen found in the Universe is in the form of H2 (or H2O, for that matter).
Extra credit points for guessing in which form most of the Hydrogen is.
Regards,
Isn’t pure water a mix of H2O and equal concentrations of atomic hydrogen and hydroxide? Granted, the two reform into H2O when they meet, but I think I recall the ratio remained constant.