The genetic factors estimates come only from adoption data, and there are studies that condition further on things like adoptive parent material conditions. The researchers are not dumb; they have put some thought into it.
One of the first results on google scholar that came up when I checked into your claims is a recent study that contradicts everything you wrote here. (Since you never cited anything I won't either.)
At a minimum, this topic is more complicated than you think, and you aren't using the correct statistical terminology when you discuss it.
At a minimum, this topic is more complicated than you think, and you aren't using the correct statistical terminology when you discuss it.