Are "scientific discoveries" causing unnecessary bickering in people today? Esp. in reference to child education?

In a previous discussion I have found that people tend to be using scientific discoveries about child education to argue whether something is right or wrong for children in general. I would like to pose the following thoughts:

Other than major issues(which I’m trying to avoid getting into here), like abuse, drugs, etc., did the majority of us not grow up into mature adults? In spite of too much TV, exposure to improper language, or crying for excessive amounts of time?

Is it acceptable to say that the opinions of some individuals and their children can not apply to the lifestyles of others? Or rather is it proper to put down someone’s parenting based on a blog or whatnot and without actually witnessing the behavior in question?

Finally, and generally, is science not showing us evidence everyday that opposes previous thought? Why and how is it that we as a species find it so hard to make decisions based on our instincts rather than others opinions (i.e. of researchers, etc.)?

P.S. In NO WAY am i putting anyone down or bashing science in any way. Just sharing a few wandering thoughts and interested in a little enlightenment of my own (as knowingly hypocritical that may be to my final thought LOL).