Is pedophilia a viable reporoductive strategy?

de Waal (1990) agrees with you; he theorizes that homosexual and pedophilic behaviour among bonobos serve a pro-social and conflict-avoidant function rather than a reproductive one, and were selected for those reasons.

However, as Anderson & Bielert (1990) discovered, mating with females on the edge of pubescence is a common reproductive strategy for male primates who are subordinate to a dominant male. Even though mating with a prepubescent is unlikely to result in offspring, it will do so on occasion, offering a chance at passing on genes which does not require competing with the dominant male.

I think that mating with prepubescent females is also likely to offer a reproductive advantage because it ensures that when your mate does become fertile, you are there before anyone else.

In any event, I think it's likely that both reproductive and non-reproductive pressures were involved in shaping pedophilic orientations, with the former playing a larger role the closer the object of desire comes to pubescence.

One last thing:

"I do not view hebephilia as a paraphilia"

Why thank you! I don't view pedophilia as a paraphilia either.