Jimro, I wouldn't take that website to heart. That's why I honestly trust the knowledge of people over the Internet... I get what you are saying about the "math". Years ago when I first started using a mil/mil scope I was made fun of. I was told it was too confusing and would never catch on, MOA adjustments were the way to go. Today all but one of my high powered rifles have mil/mil scopes on them.
I have always preferred a SFP scope too, so a mil/mil is perfect for that.
" The strongest reason for the people to retain the right to
keep and bear arms is, as a last resort, to protect
themselves against tyranny in Government...." - Thomas Jefferson