This is mostly false.
"Child support" that is capable of realization from a married woman's boyfriend (usually not Brad Pitt) is insufficient to keep her and "her" child from being wards of the state.
The consequences of placing minor children with lying whores who are incapable of self-support are so severe that it is usually unwise to do so.
Eliminate the presumption of mother custody, and the problem goes away.
That is a few more rungs up the ladder. Right now, I would like to simply remove the "presumption of the husband's paternity", even in the face of a DNA test that proves otherwise.