The hole is certainly not beyond the abilities of most senior golfers. It's not easy, but it's not like they can't hit a short iron up on there.
It might be beyond the ability of some ladies and beginners. [My definition for that would be, they have to pick up more often than they finish the hole.] But I'd guess that often, those players are playing with each other, so it's not a big deal to them.
I think it would be highly instructive to ask the members of Dornick Hills how much they mind that, as a trade-off for having such a unique golf hole. My guess would be most of them don't mind, and that many take a great deal of pride in the hole and in getting proficient enough to play it well. Note that they have changed some other things about the course, sadly, but they haven't changed the 16th.