Perhaps he's referring to the notion that, in general, the taste of distilled water differs from mineral water?

Also, I was about to post a concern about distilled water possibly leaching nutrients from the body, but a quick google reveals the opposite may be true: https://www.nutriteam.com/distilledleach/

I'm the source. Have you tried water from these devices? P mich awful distilled water.

Well, it's essentially producing distilled water. Many people find that somewhat distateful.

The water is pulled from the air