This is extremely similar to what my 4-3 team is looking at, including the description you gave of the 6-1 team leading the way. H2H is always going to be luck-based, some years it works out and some it doesn't.
It was fun to give this a shot. I think we're allowed to do something "wild" in fantasy every decade!
Being very active/successful on the wire always makes a huge difference, but it's also part of the exact same reason that you can likely wait on QB with a high degree of success (for more or less the same reason it works for K/DST though a less extreme example).