Sure I can have my cake and eat it too. Philo didn't record anything about John the Baptist, but surely someone like Philo knew about him, being that he was in the proximity of the Herodians and all.
And didn't you say that Philo wrote about 'minor' religious figures? It's funny that he didn't mention John the Baptist---but Josephus did. Go figure. So, it sounds like you are really stretching your assurance as to just what Philo would have written when, as issues of historiography go, we don't really know for sure just what Philo would have written...other than things related to his philosophical theology and to his familial relationships in Alexandria and Palestine.
So, let's get this straight. Philo doesn't mention John, but Josephus does. Philo doesn't mention Jesus, but Josephus probably did mention at least some little tid bit about Jesus, despite all of the hem and haw from critics that the passage has some additional fabrication to it. Something's fishy here, and I think it's our expectation that Philo cared all that much about Jesus, his entourage, or his affiliates, and hence, we find that Philo says nothing.
Peace,
2PhiloVoid