Golf is the only sport in the world where people assume (and even demand) that the advice they are given about proper technique should also be the healthiest and hurt the least.
Bottom line: If you use the technique of a tour pro and produce the same types of stresses on the back, and torque on the joints, etc.....it is not good for your body and you'll probably experience some pain at some point.
If a football player or basketball player blows his knee out, it is precisely because he was using good technique, and changing directions very quickly...and some body part just gave up.