wrong sir, the way motorcycle shift forks and gears are setup its easier on hard parts when NOT using the clutch. When into the gas hard your gear stack is loaded, then you clutch and unload, change gear and BANG the gear stack is slammed in to the nect gear and wears shift forks and bearings. If you had just not used the clutch the load is still on gear stack and everything is hunky dori. Hell even upshifting I wouldnt use the clutch if it werent a violent shock to the rear tire even with rev matching.
Besides there is a reason that every type of motorcycle racing they never use the clutch to upshift.