I have to disagree with this. I'm gonna be frank, this is the elitist view that cost liberals and progressives the presidential election. I'm a pretty cynical person and while I think voters can be dumb, they're not that dumb. There are always compounding and complex reasons for Trump having been elected, or totally sitting out the previous election. Progressives didn't want to vote between two genociders and turn it to tally on who will kill less. Meanwhile, working class voters are frustrated with the cost of living not being able to be met voted for Trump. You might be surprised to hear that the working class constituents who voted for Trump are from the base of The Squad of Alexandria Ocasio Cortez' and Rashida T'laib. AOC asked her constituents as to why they voted for Trump and all of them expressed discontent with Democratic establishment's lack of urgency and broken promises, especially with the cost of living. They did not vote Trump because they tolerate or like him, they voted him in protest against the establishment Democrats.
At the very least, many populist progressives are getting elected and primarying establishment Dems. In that way, the Democratic Party is being morphed to become more progressive and return to working class roots.