Except your nutes introduce pH changes, all this means is that your solution is balanced appropriately. After adding nutes to my water the pH changes from nearly 8.0 pH (alkaline) to 6.5. You can add lime to raise pH in a medium because it is introducing alkaline solutes into the area when it is hydrated (when plants can uptake nutrients). There are thousands of ways you might encourage plant growth and introduce the required elements of life, but that doesn't change the basic biochemistry occurring regardless of what we might believe.
This was my point exactly! I didn't pH balance my nutrient water and yet the soil has no trouble taking up the nutrients because the soil pH remains in the correct range. The content of the nutrients may change the pH of the soil over time. But the pH of the water doesn't matter to the plant in terms of uptake.
Regrettably, this will not work for everyone either. Because the solutes in the water people have access to varies. If I didn't drop the pH of my water, my plants would still be alive (probably) but they wouldn't be doing as well because my water is simply too alkaline. Some people have water that is perfect, other people would need to take action to improve the water if they wanted to maximize their plant's health.
Of course you can have pH lockout, when the pH of the medium varies beyond the range of uptake for nutrients in that medium.
