When I was living in northern Harford Co. MD I used to go to a golf driving range that also had a nice Putt Putt course.
As I was getting reading to leave late one Saturday afternoon after hitting a large bucket of balls, I saw a dual cab pickup with PA tags pull in and with some sort of landscaping company logo on it.
Four young guys got out – one black guy, one white guy, one guy who looked Hispanic and one young Amish guy. The Amish guy was wearing traditional Amish attire including the suspenders and the straw hat, but he must not have been married yet as he didn’t have a beard.
Anyway the four guys came to play some Putt Putt, presumably after having a worked on a job and on their way home. At first I thought it a strange sight, but then again, why?
There are a lot of misconceptions about the Amish, among them that the Amish are dour and aren’t allowed to have any fun or are forbidden to work with or have friendships with the non-Amish.
My brother, until recently lived in NJ and liked to go to the beach at Stone Harbor. One week-day not long after Labor Day, he saw several vans pull into the municipal parking lot and several Amish families get out. They spread their blankets and beach chairs on the beach and brought picnic baskets. The children played Frisbee or tossed footballs or played the in sand just like other kids, and some, both kids and adults got into the surf, although only knee deep; the men rolling up their pants and the woman hiking up their skirts to just below their knees.
My brother asked the lifeguard on duty and he told my brother that it was not unusual to see some Amish families there after Labor Day and that they would usually come mid-week when the beach wasn’t so crowded as so they would be gawked at so much. He said that some came from PA and some were from Delaware and they hired vans to drive them to the beach for the day.
Interestingly, while one would think they are dying out, the Amish population is growing and spreading.
The Amish population in the U.S. numbers more than 270,000 and is growing rapidly, due to large family size (seven children on average) and a church-member retention rate of approximately 80%.
https://en.wikipedia.org/wiki/List_of_U.S._states_by_Amish_population
That’s not to say that I hold all Amish on a pedestal or all in great esteem. There have been exposes about alleged child sexual abuse that is often dealt with within the church and community and not always in a good way, although it is debatable how wide spread it is.
http://abcnews.go.com/2020/story?id=316371&page=1
And then there is the whole puppy mill thing (which to be fair, not all Amish engage in but it is a problem here in PA) and of other animal abuses, such as of their horses.
http://www.wgal.com/news/charges-filed-in-alleged-horse-abuse-case-in-lancaster-county/41065878
In my experience with what I call "Older Order" and "Oldest Order" the retention rate is much higher than 80%, and criminal problems (i.e., the child abuse you mentioned) a small fraction of non-Amish averages.
Indeed, I'd say that for your figure of 80% to be remotely accurate they must be counting Amish who move from one Older Order settlement to another maybe not so "Old".
Of course Amish are human beings and like all humans are fallen and fall short of God's glory.
But they are sincere in their beliefs and in my experience do a better job with their own youth than us non-Amish on average do with ours.