They almost have a point when it comes to highly utopian Western leftists. Rather than embrace nihilism, left politics can offer another way to hope without a material grounding, buy of course this only works if the strain of leftism has been stripped of its material grounding.

You will actually see this pretty often among various idealist parties and orgs, even ones that claim to be Marxist but bamboozle themselves with naive electoralism or becoming detached from their communities or supporting all unions no matter how reactionary.

But once you actually have a material grounding, it's the exact opposite. Socialism provides a material goal and outlet and a project to work for in your own life and together to achieve revolution. Christian revivals are just the incoherent fusion of apocalyptic prophecy about how nothing but belief in Jesus matters and the United States' most reactionary political tendencies that emphasize that every marginalized group must be invalidated and crushed.