If "it depends," then by definition, it isn't objective, wouldn't you agree?
Objective truth in science is whether the universe is ten quadrillion years old or ten billion.
Well, it's actually a bit less than 14 billion, but that objectivity comes only from accepting that "the universe" is the one that we can perceive. And the one that we can perceive, based on all the available science, it about that old. On the other hand, it is not clear that this 14 billion year old universe is not just one of many in a multiverse that nobody understands. By the way, the fact that I can say "nobody understands" is also, right now, another objective truth.
Objective truth in religion is whether it's a good thing to sleep with the neighbor's wife or not.
I disagree! I can conceive of situations in which sleeping with the neighbour's wife may well be a good thing. It depends, I think, on the attitude of yourself and the neighbours, and probably your wife, if you have one. It depends on whether then neighbour is your brother, and he's impotent, and he wants (as Onan's wife did) an heir who inherits most, if not all, of his own genetic makeup. It even depends on whether you have come to love your neighbour's wife, and she you, and your respective partners have done the same...it has happened! I actually know of two couple who made precisely that switch.
One can be happy through various paths and few of us ever find much truth and nobody ever finds it solely by his own efforts.
I think, actually, that you are both right and wrong. Yes, there are various paths by which we may find happiness, but in my readings of many human thinkers and authors, I have found many who have found strong truths, and very often, through little except their own efforts.