It’s impressive that you uncovered this argument on your own. What you are describing here has typically been referred to as the Kantian moral argument, or the moral argument from practical reason. If you go on PhilPapers, you’ll find that the section dedicated to moral arguments for God is full of arguments in this stripe. The argument has usually been derived from Kant, but Henry Sedgwick brought it to academic attention (he was a sympathetic critic of the argument). Some modern arguments with similar ideas behind them are Layman’s moral argument and Goetz’s moral argument, both of which tackle the disconnect between the demands of morality and one’s own wellbeing. If this argument interests you, then you may also be interested in John Hare’s Moral Gap argument. Finally, you may want to check out Clement Dore’s analysis of moral wrongdoing being intrinsically harmful as further proof of this harmony theory.
It’s impressive that you uncovered this argument on your own. What you are describing here has typically been referred to as the Kantian moral argument, or the moral argument from practical reason. If you go on PhilPapers, you’ll find that the section dedicated to moral arguments for God is full of arguments in this stripe. The argument has usually been derived from Kant, but Henry Sedgwick brought it to academic attention (he was a sympathetic critic of the argument). Some modern arguments with similar ideas behind them are Layman’s moral argument and Goetz’s moral argument, both of which tackle the disconnect between the demands of morality and one’s own wellbeing. If this argument interests you, then you may also be interested in John Hare’s Moral Gap argument. Finally, you may want to check out Clement Dore’s analysis of moral wrongdoing being intrinsically harmful as further proof of this harmony theory.
I was aware of Kantian argument roughly but yeah I'm surprised this has a few defenders! Thank you for your resources.