The problems you don't even acknowledge are there won't ever be resolved nor addressed. Sure, you can keep ignoring them, but as life goes on the pile of stuff just sitting there that you constantly have to keep looking away from grows significantly. Not life I want to live, nor a parent I want to be.

If somebody's kid dies from polio or whatever, there's no solving that by talking about feelings. Scientists and doctors can make sure it doesn't happen again but we're talking about the way parents reacted, or didn't react, to trauma. If in fact they generally didn't talk about it and just soldiered on, that was an effective method of dealing with it. Better than spending years in therapy crying about it, as seems to be fashionable these days, which won't bring their kid back. And particularly, moving on without dwelling on the past seems better for the surviving children than the parents becoming overprotective (the thesis of this discussion, if I've understood it.)