Others can act as they wish. The Amish wish to be as little entangled and as much independent from the world as possible.
It must be working. There's something like 150,000 of them now.
They will take over much of the US farm economy in our lifetimes.
When the Amish started moving into north central Wisconsin and my in-laws were selling their farm, they hoped Amish would buy it because they pay cash (no land contracts). The Amish who looked at the farm didn't buy it--because my in-law's house was too small (it only had three bedrooms).