For the sake of humour, I was taking a cheap shot and consequently disrespectful and irreverent...please accept my apologies!
The MLG aft trunnion failed in shear - but that doesn't make it a shear pin.
The "trunnion shear pin" appears to have been an invention of Avherald, subsequently parroted verbatim by several of the enthusiast sites.
I was wondering about the engineering design concepts that would justify the use of shear pins in MLG attachments. I believe you are correct on the whole shear pin nonsense.