Dr Wades Airplane Metaphor

i understand the metaphor he is trying to make, though i dont necessarily agree or think it is used in the right context. he talks about how there are two airplanes, and one airplane nearly always gets you to your destination safely - this he is referring to a two parent home, a heterosexual home. and the other airplane gets you there most of the time - but significantly less than the first - this being a single parent home. well of course, i think that most of the time it is much healthier for a child to have two parents, and that having both a mother and father who are loving affects the child positively in a great way. and though a single parent can provide a lot of love and support, it most likely may have some negative effect on the child not having that mother/father there. but i do think this is so relative to say, and i think discussing the success of a single parent home is a separate issue from having a same sex marriage. dr wade does not give any statistical evidence of the success of a same sex household - let alone if the household is loving or not too. he is giving statistics to a issue that is entirely separate. and i do agree with his metaphor, due to the fact that a two parent home is primarily more successful than a single parent household - especially with the evidence of the statistics. but i just think it is entirely unrelated to a same sex marriage and the effects that has on a child.