You are right about one thing, happiness has nothing to do with statistics. However, I don't agree with you that stereotypes destroy our lives. Science is build upon representative facts extracted from the observation of a large group. For example, it is a scientific finding that big butt women attract men more than small butt ones because through thousand years’ observation, men conclude that big butt women have better genes for their kids, and such conclusion is embedded in our aesthetic principles. Sorry for small butt women, but that is fact backed by scientific proof. You may call it "stereotypes" or whatever you want, but that is how men think.
In addition, it is funny to read that at first, you say that people should not discuss how 'beautiful' they are. And later, you said Russian girls are the most beautiful girls in this Earth. You are not just discussing how 'beautiful' certain group of girls are, what is worse, you STEREOTYPED Russian girls' prettiness over girls from other region. Allow me to defend on behave of all other girls from other countries on the earth, they are more intellectual, open minded, and attractive. At least, they are logically consistent when they argue.