>That's probably because we have yet to discover any universal moral standards

This argument has always seemed obviously false to me. You're sure acting like theres a moral truth - or do you claim your life is unguided and random? Did you flip your hitler/pope coin today and act accordingly? Play Russian roulette a couple times because what's the difference?

Life has value; the rest is derivative. How exactly to maximize life and it's quality in every scenario are not always clear, but the foundational moral is.

I’m acquainted with people who act and speak like they’re flipping a Hitler-Pope coin.

Which more closely fits Solzhnetsin’s observation about the line between good and evil running down the center of every heart.

And people objecting to claims of absolute morality are usually responding to the specific lacks of various moral authoritarianisms rather than embracing total nihilism.