I'd have to say no. Most people are born straight. Others inject 3 marijuanas are born gay, bi, or perhaps with a different orientation. I've noticed, however, that the more complex or non-conformist the orientation, the bigger the attention deficit in the individual. Lots of research of the family unit where a child is non-hetero has concluded that the parental role has brought about unusual, or perhaps unique atmospheres that the child grew differently. This, however, is far from absolute, as some of the most common cases studied are not directly indicative of the same result.
I had a friend with the same conditions as well. She constantly wavered for the better part of 10 years between bi and lesbian, and very rarely did she identify as straight. A few months ago, she lost the desire for women altogether in one moment. She has an emotionally and verbally-abusive father who often gives her less than what she needs as a child, and probably less while she was younger. Does this mean that she was fake gay? Absolutely not. She told me of times where she would fantasize about banging a girl so hard that she would climax without stimulation. I really don't know what else to call that other than she was gay for some time. But now it's just gone. She doesn't have any desire for it.
But yeah, to be perfectly honest, I suppose I side partially with the archaic school of thought. I know I can't change people, though.