If such an idealization exists, that would of course be preferable.

I suspect it doesn't, which may color my position here, but I think it's important to consider the alternatives if there isn't a generalizable ideal; specifically, we should be working from the opposing end, and try to generalize from the specific instances; even if we can't arrive at Strong Friendliness (the fully generalized ideal of human morality), we might still be able to arrive at Weak Friendliness (some generalized ideal that is at least acceptable to a majority of people).

Because the alternative for those of us who aren't neurologists, as far as I can tell, is to wait.