Rat- I guess you have never used it and have tested both. If you did, you would know distilled water has lots of bad stuff in it. If you like Silicates, Phosphates, salts, minerals, metals etc then use distilled by all means. I have a tester at home and so far distilled water is junk.
PS. What does surgeon general care about stuff I use in my engines? He does not know anything engines. People should not drink Ro/DI water, it is too pure and nothing new (very old news).
I guess we the users and mods can stray from the topics now. hmmm, weird.