I don't think bare shaft tuning is hard or difficult. I do it sometime, but I've been matching arrows to bows for so long that I seldom need it. Too, one's form needs to be at least reproducible for bare shafting to work. A lot of folks don't have form consistent enough for good bare shaft results.
A lot of folks also make the false assumption in the other direction. That is, they think one can't get good arrow flight without bare shafting. Just not so.
OP, finagling as it pertains to arrow tuning is experimenting with point weight, arrow weight, length, diameter and spine, and bow brace height, side plate thickness, even bare shafting, etc, to get an arrow to fly well out of a given bow.