The reason that finding might matter to us, is that recent studies in mice and zebra fish have shown that hearts with more diploid cells—like a zebra fish's—are able to regenerate and heal themselves.
But studies have found that for many people, the negative psychological impact we feel from losing something is about twice as strong as the positive impact of gaining the same thing.
And so eventually what you get on this side are, instead of having ones that are haploid, you'll actually have some that could even be 4n or 3n or 2n on this side.