Pressing, Ctrl, Shift, etc. combos strains your hand. With sticky keys you can press key combinations by hitting the keys one after the other, instead of simultaneously.
A couple of years ago I heard that one should press Shift/Ctrl/Alt using one hand and other key(s) of the combination using the other hand. At first, it was awkward. I had felt that I was soooo slow. But after a week or two I got used to it. Now I can't even imagine going back to using just one hand for the combos and for sure the stress on my wrists is lower.
Pressing, for example, Ctrl+C is simpler with the left hand only and if one uses sticky keys then it's two separate keypresses, no stressing of the wrists needed.
Pressing, Ctrl, Shift, etc. combos strains your hand. With sticky keys you can press key combinations by hitting the keys one after the other, instead of simultaneously.