You misread my post. The “marginally used feature” is manual placement of the 3D cursor, not clicking the left/right mouse button (which is not a “feature”, merely a means of triggering a feature).
Placing the 3D cursor manually by clicking in the view port is, from experience (personal and second-hand), a marginally used feature. At least compared to the variety of other uses for a mouse button you so kindly pointed out in your post.
And just so no-one has to embarrass themselves - yes, I accept your apology for flying off the handle about something I didn’t actually say.