I think parents believe certain things based on what they're taught and their gut instincts; many parents have an opposite view than this one, thinking that "tough love" and high pressure childhoods make the children grow up to be better adults.

This research basically disproves that, saying that nurturing and loving upbringings have that effect, while cold tough upbrinings are detrimental.

Having that kind of evidence is extremely helpful—either parents who read it might change their mind, or it could be discussed in parenting groups.

Either way, the point is that it's scientific evidence. People may eventually come around to it, leading to a better world with more nurturing parents and better childhoods and therefore better adult lives for a great many people.

Will it happen soon? No. These beliefs are often so dogmatic and almost religious in nature that it's unlikely to affect the people who hold them. But maybe it will reach their children.