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That's fine. Some bacteria is actually good for you. Even trace amounts of "bad" bacteria will help build your immune system so you don't need to kill all bacteria.

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This is about hospital infections, not the hygiene hypothesis.

I also have yet to see any evidence that hygiene hypothesis is true or leads to better long-term health outcomes.

There's actually pretty good evidence now that childhood sanitation is correlated with the incidence of Acute Lymphoblastic Leukemia (ALL). Edit: accidentally wrote inversely

Here is a pretty good overview:

https://www.medscape.com/viewarticle/897242

Note that this is a little different than the usual interpretation of the hygiene hypothesis.

The book An Epidemic of Absence presents a pretty compelling case, I recommend it.

a 400 page (tl;dr), non-peer reviewed book (no endorsements from the scientific community) is probably not the best evidence to present.

That's true, but when it comes to hospitals, you want to try and minimize all bacteria. Your skin may be a very protective organ, however if you get those same bacteria in a wound, it could lead to dangerous infection.

This. While you're hospitalized is not the time to be trying to build your immune system's character.

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