Uh huh. How much meat have you trimmed? Tons? Slightly dull is sharp enough to separate meat from silverskin, but not chop into the meat or silverskin. It’s faster, more efficient, less wasteful. If you’re using a sharp knife, you’re either not being thorough, you’re being wasteful, or you’re taking longer than you need to. Full stop. A slightly dull blade is the technique.
Uh, yeah, obviously.
I’d bet my car I can trim down a pork loin faster than you, with less waste, and less bullshit left on the meat. But who knows, maybe my “slightly dull” is the same as your “sharp”, and this is all a big misunderstanding.