Note the crooked crossarm on the left in the distance.

This kind of heavy weight pulled hard upon their insulator pins as well, causing them to "sink" into their arms if their securing nails that were set into their crossarms let go.

Wooden pin replacements were commonplace for many years. A long-time employee of the Hingham (MA) Municipal Lighting Plant (the late Stan Magner) told me they'd go around town with a "pin bag" on the back of their line trucks when doing routine inspections for defective pins. Before the days when steel pins were the standard for them and other electric utilities here in the Boston area (before around 1960).