Just like all things in life, there is no one simple answer as to whether tightening the nut is preferable to tightening the bolt head. I've always tried to tighten the nut as I think that is the better choice. So I did a Google search to find information to defend that position. There isn't much. This Canadian website that discusses tightening of bolts in steel construction states nut or bolt turning without differentiation.
https://www.appliedbolting.com/turn-of-nut-dsq.php. This Marsh Fasteners website states in most cases there isn't any difference between tightening the nut or bolt head.
https://www.marshfasteners.com/matter-whether-tighten-bolt-head-nut/. Two situations where one should tighten the nut and not the bolt head is if the bolt is long enough that twisting torque is a significant component of the torque, or if the bolt has interference with the material it passes through. And there are innumerable cases where a bolt is screwed into a block rather than going through it, like engine head bolts, so obviously tightening has to done using the bolt head. From what I read, tightening torque consists 80% to 95% friction between the nut and the piece being bolted with the remainder being torque to stretch the bolt.
So Mike, even though I agree with you that we should tighten the nut and not the bolt, it looks like that position may not be clearly defensible! :dontknow: We just might have to admit that PRP has a valid point. Ouch!!!