I agree with this. I have 2 PREs, and they are very different from each other, but also extremely different from the WBs I have had. While their temperaments are amazing - both were stallions before being imported, one actively breeding, and they are so kind, without a mean bone in their bodies, though quite opinionated! - I have found them no easier to ride (correctly), and in many ways for me as an amateur (who has ridden through I1 on a WB) they are more frustrating. I just don’t seem to have, or to be able to develop, the very precise feel and nuance that they seem to require in order to be ridden correctly enough that they become delightfully easy, as my professional trainer finds them. And when not correct, they are tight, overuse their necks, and don’t push through their backs. It is a constant struggle for me.
It is very frustrating. I know it’s not the horses, it’s that I’m just not skilled enough, but given that I simply might never be, no matter how many lessons I take or how hard I work at it, I feel like going with the PREs might not have been the right choice for me (though again I couldn’t ask for better temperaments). So I do think their “easiness” is overstated and a bit of a myth. Actually I don’t really believe that any horse is easy lol, and these are just hard in a different way.