Not a pessimist here although I've had a short lived but edgy Schopenhauer phase years ago.

That's what Huxley called perennialism. This "wisdom of the ages" philosophy was also heavily promoted by the Royal Society, Tavistock, SRI and CIA (also through eastern influenced theosophy, new age and the hippy movement) as a new world religion of the future man.

The common critique of it would be that there's a limited set of moves one can make in metaphysics, epistemology and ethics (and all three branches of philosophy are interrelated). For example you either believe the world is purely physical and matter in flux or you believe in a metaphysical realm beside it. Or that everything is either ultimately one (monism), two (dualism) or many (polytheism and multiplicity). Here we have a third option which is the trinitarian doctrine of Christianity. It's an either/or binary and your position on it will lead to other consequences down the system. That's why people who choose the pick-and-choose preference based approach for their worldview often hold contradictory ideas. Consistency in the worldview is the lack of such contradictions.

Jesus is at odds with the worldviews of both Voltaire and Camus. Voltaire is obvious because he's very much an atheist and a poster boy for liberal progressivism and secular humanism. Camus, being an existentialist, holds that the life is meaningless, but in spite of that we must struggle to find our own made up meaning, which leads to embracing absurdism. Maybe there's a false image of Jesus reinterpreted as a zen hippy boyfriend type who's all about love and peace, man, but that's a recent invention and an apparent heresy to anyone familiar with Christian theology.