They are, of course; but even so I think that "too tight" and "too wide" are pretty easily definable, aren't they? "Too tight" means a SL used for a trade, or set of trades, or a system, which would produce either more profit or less loss if it had been wider, and "too wide" means the converse? That seems pretty much objective and whether or not it's true in any specific instance is independently verifiable.