[DennisP]

It's possible to eat a DASH diet while leaving out the foods with the highest oxalates. It's what I do myself.

Avoiding high-oxalate foods if you're prone to oxalate stones isn't a meme, it was the advice of my urologist and the printed pamphlets he gave me. Along with drinking plenty of water, especially with meals as I mentioned above. As for calcium, it's mentioned as protective in your quote.