there are probably at least 100 guys on here that would beg to differ with that opinion. I would be curious to know you're definition of a "Lift", a body lift in my eyes is less of a true"lift" than cranking the torsion bars
It's true that it will decrease your sag amount since you are not lengthening the shocks, but for the general person who wants to fit bigger tires and isn't going to be rock crawling, just needs a better off road stance to clear some additional height this is a very effective method of "lifting" a truck.
After all a "lift" is anything that adds clearance to your vehicle for use off road. Larger tires could be considered part of a lift.
Is this the best method, no, but it is the most cost effective method for any gen 2 drivers out there. Ultimately we would all be able to have a 6" suspension lift with auto disconnecting sway bays, 36" of droop, SAS, Air lockers, 36" tires, and still get 20mpg but there are trade offs with everything you do.
04trac, if you have a 2x4 then you have nothing to worry about, and can even go higher than 2", although it may increase the harshness with the increased suspension angles. I wouldn't go much over 2", 4x4 guys have to worry about burning up the CV joints, but you are clear for lift off