I dont think so. Why would morality inhibit progress. Stale knowledge does prevent, but morals dont really change. By morals being flexible, I mean - “Killing is very bad, except in so and so situations, you have to”.
You assume that what’s considered “moral” or ethical hasn’t changed multiple times throughout history and that it isn’t subjective. Sorry to sound pedantic, but once again, it’s right in the definition of the word:
a person’s standards of behavior or beliefs concerning what is and is not acceptable for them to do.
And nowhere does it say that “morals” imply any degree of immutability. There are countless examples I could make. Just as a personal example, I never particularly paid mind to the suffering of animals until I adopted a pet. I never believed getting involved in political discourse was a duty until I realized how increasingly distorted it’s becoming. Many people say similar things about having children, how the experience just changes the way you see the world, your perception of what is tolerable and what is not, and ultimately your perception of “right” and “wrong”: your morals.
If we as humans didn’t believe that we can actually influence other people’s conceptions of what’s right or wrong, there would be no point to education, history, politics, philosophy, law, religion, art, literature… culture as a whole. We wouldn’t have communication or civilization.
My honest opinion is that what you’re truly asking here isn’t whether it’s okay/possible for morals to be flexible, you’re asking whether it’s okay to stray from what you’ve always perceived to be the general consensus of what is “moral” and what isn’t. And my answer is still yes.
Thank you for saying this. Tolerance paradox paradoxing hard; I will never understand those people and their naive, stubborn black-and-white thinking.