I understand and basically agree. Information is good. Alternatively, however, I hesitate to advise new growers to spend more than they need to spend, or worry more than they need to worry. Chances are, tap water from a public utility is fine, especially if it's drinkable. Sure, it's betting on the favorite to win, but many decisions are made that way. There's no harm in checking the pH, but it's likely to be of no benefit when growing organically. I think that's all some of us are saying. I would advise pH testing and potential adjustment for synthetic nutrients. The difference is why we need to know the style of growing.
Growing in living soil is similar to but not the same as growing organically. I grow organically, but I don't grow in living soil. It isn't a trivial distinction. I suppose I get a bit defensive about my style of growing, though. It's often misunderstood.
Biological processes don't buffer. It's about mycorrhiza, which is a mutually beneficial symbiotic relationship between a fungus and a plant. The plant makes organic molecules by photosynthesis and supplies them to the fungus in the form of sugars or lipids, while the fungus supplies the plant with water and mineral nutrients, such as phosphorus, taken from the soil.
(https://en.wikipedia.org/wiki/Mycorrhiza) Because nutrients for the plant are supplied by the fungus, pH is irrelevant if the fungus thrives.
Oh, I start other types of plants in my tents, too. Starting isn't quite the same as growing to harvest, though. I'd love to grow blueberries, but, like I said, the bears like them. We have lots of wildlife where we live. I once looked up from gardening and found myself looking at what must have been a 10- or 12-point buck. He was about four feet away from me and looking at me square in the eyes. I decided to let him win the day and I backed away slowly. He certainly wasn't going to give ground. Few things can be grown here that the deer or other critters won't eat.