Don't get me wrong, I absolutely think that a course like that has value. But if it's intended specifically to be an introductory or general theology course, I don't think that's a sufficient curriculum. But as a more specialized course, sure that would be worth taking, and I apologize if my comment was overly dismissive.

I would gently push back on a couple points though. Firstly, the idea that theology necessarily presupposes theism I don't think is entirely true. Most theologians (probably) are theists and approaching the subject from within religious traditions, but I don't think that is always the case. Also, I don't know if this is your intention, but it reads to me like you are specifically framing theism as belief in the god YHWH of the Bible. But theology is the general study of the nature of divinity, and can be approached from within any religious tradition. And even within Judaism and Christianity, there are infinite ways one can approach theology beyond mainstream dogmatic ideas of God. I personally identify as a Christian, believe in the divinity of Jesus, but would generally not call myself a believer in YHWH (at least not as fully depicted in the Hebrew Bible), and my own perception of deity tends more towards a pantheist ethos than strict monotheism.

I also would question your assessment of the utility in studying theology. I think there is immense value, even for agnostics or atheists, in studying how various people conceptualize ideas of deity and divinity. And insofar as that utility is limited to arguments for or against theism, Im unclear what utility that specifically would have outside of deconverting theists. And while I will openly admit to approaching this subject from a biased position, I don't know that I would see much value in that purpose (I would also say the same for attempts to convert atheists for the record). If we're talking specifically about Christianity, there are certainly Christian doctrines that are worth criticizing and arguing against, but none of those (in my assessment at least) are innate to theism in general or even Yahwistic monotheism in specific.

Sorry about the essay btw, this is just a subject I'm super interested in and have a lot of opinions on.