Among Buddhists, there are times and places in which such an assertion is made. I wouldn't contradict it, certainly, but I notice that the ones making the assertion are generally human beings and one of the things I have learned in Buddhist training is to take a little skeptical care where my own judgments, however scrumptious, are concerned.
And so, when I hear my fellow human beings asserting good or bad news about the human condition, I feel a little as I do when I hear that the Vatican plans to investigate instances of pedophilia in its ranks or that the police department will handle "police brutality" cases: Is there no other source, one not so cozily aligned, to render a sensible point of view? In-house investigations aren't always the same as "in reality."
And if there is not, am I wrong to wonder if this isn't a bit like a teenager admiring his or her reflection before a high school prom at which s/he really wants to look good? "'O frabjous day! Callooh! Callay!'"
I am aware that there are men and women of great learning and, for all I know, great accomplishment, who will extol the good fortune of being born human -- how rare! how fortunate! -- but how much of this is worth crediting?
The best I can figure out is that if it is true, it's true. If not, then not.
And the house cat, elephant and humming bird may be the exemplars worth heeding.