Conservatives, as well as liberals, would undoubtedly be happier living in the kind of world envisioned by the left.
Very few people have either a vested interest or an ideological preference for a world in which there are many inequalities.
Even fewer would prefer a world in which vast sums of money have to be devoted to military defense, when so much benefit could be produced if those resources were directed into medical research instead.
It is hardly surprising that young people prefer the political left. The only reason for rejecting the left's vision is that the real world in which we live is very different from the world that the left perceives today or envisions for tomorrow.
Most of us learn that from experience-- but experience is precisely what the young are lacking.
"Experience" is often just a fancy word for the mistakes that we belatedly realized we were making, only after the realities of the world made us pay a painful price for being wrong.
Those who are insulated from that pain-- whether by being born into affluence or wealth, or shielded by the welfare state, or insulated by tenure in academia or in the federal judiciary-- can remain in a state of perpetual immaturity.