Good morning Neal.
Actually some thought went into the table height. My big concern involved the Stihl chop saw. It isn't light. It does grab. And it doesn't cut all the way through with one pass, even with a fourteen inch blade.
This height allows me to use the Stihl comfortably. I get to use my hips, legs, and my back.
And even though it isn't visible it's good for the angle grinder. Cutting the rock isn't like grinding a weld. The blade wants to grab. One has to put pressure against the grinder as it cuts stone. This height again allows me to get stronger parts of the body involved.