Not at all. But a decent family with money can certainly provide for a child without a father. Lots of us grew up that way.
The problem comes in when people, including many here, share the MSNBC/VIEW view of the Palins being a decent family.
One could take your reasoning and say that married parents simply don’t matter. Children born to “decent families” will do well, irrespective of marriage, and those born to not-decent families will do poorly, regardless.
Such research as we have doesn’t support the contention that married parents are an irrelevant factor, but given the societal trend, it would certainly be helpful if that were true.