If they are "hard core" Amish, they eschew anything that uses electricity. "City water" is pumped. Aside from that, perhaps they prefer not to rely on "city services" preferring to be self sufficient.
With our local Amish it depends on their definition of 'self sufficient'. Won't own cars, but will bum rides from the local non Amish. Won't own a cell phone, but never pull yours out of your pocket around them or by the time you get it back the battery will be dead. Can't use power tools as they don't have electricity but if you hire them to work on your property, it's fine to use yours. When we moved here they were not allowed to own electric fence chargers but now they are allowed to use solar chargers. No rubber on their buggy tires. Too worldly but they will ride in cars with regular tires as long as they don't own the auto. No, wait! We know one Amish construction business that owns a pickup truck but they are not allowed to drive it.

The Amish that own dairy cows or goats have electricity in the form of generators. They can power the generators with electric starts from a battery. But the wringer washing machines have to be powered by lawnmower type motors.
I know each community has it's own ordnung all I'm saying is that the one that governs our local community is a confusing conglomeration of contradictions. Almost as if they have a foot in two different worlds/societies. I respect them immensely. Like them for the most part. but even though my own father was Pennsylvania Dutch, I don't understand them and gave up trying about 8 years ago right after we got out of the sheep business with our neighbor. He wouldn't worm them. They were dropping like flies from parasites. We spent a few hundred dollars and wormed the whole flock including ours that were running with his flock. Then he announced that he was going to sell his flock for sheep that were more resistant to parasites even though his flock and ours were Katahdins which are noted for their parasite resistance crossed with another breed that is also rated for high parasite resistance. My reaction was

Learned real fast that the chasm between them and us is wide and deep.
Now we are friendly with them, good neighbors, always willing to help and they are the same towards us. Sometimes that is the best you can hope for in the light of not being able to understand one another's societies.
Still it's really funny for the owner of the local small motor repair shop, a wonderful Amish family, to ask DH for help repairing an electrical system on a machine somebody has brought in for them to fix. Motors they are fine with but electrical systems.Ain't gonna happen. DH spent an afternoon teaching one of the young men how to use a voltmeter. They sent him home with a free bag of chicken scratch grains so I told DH to help out whenever he wanted to, LOL.