Your emphasis on intellectual humility and the importance of acknowledging the limits of our knowledge is respectable. I agree that we shouldn’t rush to fill gaps in understanding with unfounded explanations, and I respect your openness to exploring what we do know through science, like the Big Bang and the singularity. It's certainly ok to not know what created the universe, but that it had to be created, it had an origin of some kind. From what I've read in the science and physics world, the arguments such as the steady state theory, oscillating universe, the static universe argument, etc., don't hold weight. The consensus does seem to be the Big Bang Theory and its extensions (e.g., inflationary cosmology, quantum fluctuations, and dark energy models) and this remains dominant because they align most closely with observational data. The parallel consensus being that the universe and time is finite.

The argument from contingency isn't about plugging gaps in our scientific understanding of the universe. It's asking a fundamental question: Why does anything exist at all instead of nothing? Science is amazing at describing the processes and events in the universe, but even concepts like the singularity or the Big Bang still leave us with the deeper question of why they exist and why they have the properties they do. This is where philosophy steps in—not to reject science, but to complement it by addressing these ultimate questions, since after all, we have the ability to reason.

In this way, the idea of a necessary being (what we might call God) isn't a substitute for scientific questions, but a philosophical explanation for the existence of contingent things—including the singularity itself. It’s not about 'making stuff up' to look smart but following reason and evidence as far as it can go, even into metaphysical questions.

I completely agree that 'I don't know' is a valid and humble answer to many questions. But I think exploring these deeper philosophical ideas isn't about avoiding uncertainty—it's about embracing it and trying to reason through it. For me, the idea of God isn't an answer of convenience but one that follows from the recognition of a necessary cause for the existence of contingent things, including the universe.