The issue is not the end of morality, the issue is the hijacking of morality.
First morality was hijacked by conservatives, who tried to make all sorts of silly things — like smoking cigarettes — immoral.
Then, once the conservatives had abandoned the true meaning of morality the leftwingers stepped in and claimed it for themselves, elevating equality of outcomes and environmentalism into a new type of morality.
We are suffering from an abundance of moral absolutes in our society about all sorts of ridiculous stuff, and consequently people have gotten sick of all the moralizing and the result is that the major moral issues are mostly ignored.
The original guys who wanted to ban stuff were Progressives. But conservatism has glommed onto those types of causes too, from the best of intentions but with mixed results.
Actually, fighting for clean air and clean water is a very moral thing to do in the name of human health.
With regards to "equality of outcomes", the Right shoots itself in the foot by clinging to the myth that this is something the Left actually wants, much less pursues. Do you believe that feminists want "equality of outcomes" with men? Hell no. They want legislated and court dictated advantage for themselves at the mortal expense of men. That is the Left: pure unethical tribalism, not even remotely close to "equality of outcomes".