Mismatch
Thanks Airfoilmod for clarifying that.
Of course weight matters, but in context... if you had 1,000 similar linkpins or rivets holding something on, you would spend a lot more time optimising the design for size, weight, material and stress levels as well as on testing to assure your final release.
But if you have 2, one per elevator for instance, over-designing them by 50% wouldn't make a bat's hat of it, would it, and in fact, because being only two in a critical path, would probably require you to apply a larger proof/ultimate factor, a wider fatigue factor and for peace of mind, a larger Reserve Factor.
I've seen one or two rather crass and ultimately deadly results from not understanding or formally addressing a sensible weight/citicality balance... e.g. a single 7/32" shear pin might suffice and meet the design case, but one day fail, a 1/4" might never go anywhere near a failure mode. Weight difference approx. zero!
If an engine needs a by-pass around a heat exchanger, being on the C.G or close to it, even if it cost one pax, or two on MTOW, if it needs it - it needs it - FULL STOP