It may be a retarded ideology, but it is an ideology out of the current conditions. Marxists should look to how people feel, and where capitalism is fracturing with their lived experience, where it doesn't meet their expectations, and meet them there. The advantage of socialism, or the movement to abolish capitalism, is that it is fluid and self-directed while capitalism is driven by large systemic forces. If the majority of workers feel, for instance, that they work all day and don't receive enough in return, then of course you say they deserve more. If they say they work all day and feel like society doesn't respect them for what they do, then you say they should be respected as the backbone of society. As socialism develops maybe it is that workers say they feel satisfied with the respect they get and their compensation, but now they feel they work too much. So you move to shorten the work day, and so on.
It is all a development from the conditions. I couldn't claim to know if "normal" working class people feel like the workerist middle-class leftists from the developed countries. I think a lot of those millenials (myself probably included) get workerist ideology because they feel alienated, undermployed, they may also feel low skilled or like their service work "isn't real work" out of a mixture of guilt and confusion with how manipulating data or shifting papers in offices makes food and cars and housing and electronics constantly appear in their possession. But that is all a very real thing too, and it can be appealed to by having more "real work" available to them in the form of volunteer work. I remember when a natural disaster happened in my city, all the lefty orgs got together to help people fix up their houses for free. Most didn't know what they were doing, but they got help from more experienced contractors who were also volunteering and learned to do what was within their ability. People felt like they had really done something because they physically manifested that assistance before their very eyes, and they were fulfilled and felt like they had really "done the work" like their heroes in all the books about old labor struggles.