Wasn’t there a woman a year or two ago who was struck by lightning, but her insulated footwear prevented the charge from exiting through her legs? The bolt instead left through her, um, hind parts, so it was painful, but not fatal.
I seriously doubt it. If she was standing, the air between her rear and the ground is a far more effective insulator than the rubber in her shoes; the difference is too marginal to matter at that level of energy.