I get your point about a general low tackle allowing hands free offloads, but when applied properly ala Jake Trjobovic textbook low tackle in the modern game with all the players pushing up in support, why are they not offloading ??....truth is, IF the players did try to pass in this instance a few may stick, but with the unbalanced awkward position of the body after being absolutely drilled low or cut in half, there would be so many forward passes, loose passes, intercepts and everything else that comes with a forced pass.....proving the low tackle is and always will be effective.
Sure there would be some softer lower tackles that attackers would take advantage of for that EASY offload, but that's on the defender to get better and be more effective.
The players back in the 80's and 90's did actually pass when hit low, but this was after still keeping feet and in control to get a percentage pass to a man while standing or popping the nose through the defence line with momentum, there's no doubt the limited passes from low tackles were more about not forcing a pass, and when your skittling toward the grass at 100mph that's exactly what a pass would be after being hit by a low Jake or even Croker tackle.
If we look at the junior rep systems we have ultra entertaining games where the scores are often 42 - 34 and 50 - 28......as the kids train to hit "high'" and attack the footy in tackles, more than the player and as far as Im concerned the old saying "they can't run without legs" is 100% fact.
The sad and true part in the modern game, is without these low tackles being rewarded the attacking teams will continue to take advantage of these zippy play balls after tackler Must release early....but make no mistake.....the low tackles as shown by the few who still make them are the most effective in the game to shut a player in their tracks and the sad part is opposition teams can exploit a player who makes a clean 1 on 1 tackle and if the NRL were serious about cleaning up the game and culling high tackles and these awkward wrestles that can ene a career in 1 tackle, just maybe would consider rewarding the classic low tackles