My mom tells of when she was growing up in Australia, in the years before air conditioning. At dinner time her mother would set out all the food in a nice display, and then grab her trusty bottle of fly spray and mist all the food and dishes and the kids with it "so everyone can eat in peace". Mom and all her brothers would be coughing at the spray, Nana would tell them to hush.
... It was DDT.
They survived. Does that mean it didn't impact their health? Should everyone bathe in it?
What I've observed through the course of my struggle, is just how oblivious people are and
want to be about the spread of bacteria.
If you share a bathroom, there are other people's feces on your toothbrush (mythbusters proved it, btw).
If you go to the beach, there is aerosolized sewage in the ocean breeze.
Every time you touch a public door handle, you are spreading stuff on your skin you'd never touch if you could see it with the naked eye.
So, the myth of being "too sterile" just because one is not slathering themselves in bacteria is not something I believe. No matter what, they're going to get on you. Live on you, poop and breed on you, and eat you alive.
But what causes illness is dealing with too many at once. Sanitation keeps the numbers down so our immune systems can compensate.
We're already contaminated with Salmonella. When it's at the end of our digestive process it's fine. When we eat a bunch of it at once, that can mean a whole lot of toilet misery and possibly much worse.
* Forgive me if I'm too enthusiastic on the topic, but honestly I can't find it in me to hush.
Also, you're in Hawaii. You have every reason to believe the environment is a pleasant thing that wants you to live.
You can go wash your hair in some Shampoo Ginger, while I stare at the pots with dormant bulbs that should be making some for me. Stupid Florida winter!