“The grid is generally not vulnerable to EMP. EMP will do far more damage to electronics.”
The grid is chock full of eletronics. An EMP will bring the grid down, probably immediately. EMP resiliency efforts are focused on how quickly the grid can be brought back up after that. It could be a long time.
Sure. And a nearby lightning strike delivers far more energy as EMP at basically the same high frequencies as EMP. Most electronics survives fine with some surge protection. You are correct that EMP will bring parts of the grid down, not by blowing transformers, but by disrupting SCADA and networking. Those are easier to replace, and won't nearly as long as the transformers. Back up within a week.