Agree to a point, except as far as I can tell everything is pretty much the same between a hang-on stand setup and a saddle EXCEPT the platform. By that I mean the sticks, harness, tether, etc is all more or less identical in weight and bulk, the one thing that is different with a saddle is the thingie you actually stand on is both lighter and much smaller.
If you are comparing to a really light climbing stand the the weights may be comparable (maybe, maybe not??? I have no idea) but dont overlook the simple bulk of walking with a 20x30” platform on your back, compared to a 12”x12” flat platform that fits inside any old daypack.
the thing that brings out the fruit-loop factor in saddle hunters is that you CAN make it crazy light and small by utilizing some of the various fringe climbing methods such as 1-sticking while using a stick with a built-in platform, etc. Here, expect a steep learning curve in setup and a lot of futzing with specialty equipment, but total weights including getting you up and down the tree are realistically 8lb of gear or less, TOTAL. Thats a really different ballgame in total weight if you are carrying it around all day.