I think you are more or less correct with regards to electricity but the rule applies more broadly to technology. Obviously, the Amish use wheels and other tools. The problem for them (and which I think a great many people would agree) is when technology ceases to serve us and we (society) become indentured to the technology. Consider all these "phone-free" movements, limited screen time, and social media detoxes. In this light, the Amish seem very much enlightened that they take many years to deliberate whether a technology is an overall positive or detriment. Going back to the use of electricity. I think probably a huge part of a grid that works at nighttime is that it definitely changes society in the sense that nightlife is all of a sudden possible. You can debate whether or not it's a positive impact to society but the impact is inarguable. People will fall on different sides of that debate.
> The problem for them (and which I think a great many people would agree) is when technology ceases to serve us and we (society) become indentured to the technology.