Almost nothing that somebody chooses to believe or not believe matters - truly nothing matters
Any freshman student of philosophy can tell you that
I once took a freshman philosophy course and pretty quickly realized that philosophy courses are crap.
Otherwise, I'll give you a specific example of why the egalitarian dogma matters in a practical sense. I have a sister who is a retired teacher. another sister that is an active teacher, and two sister in laws that were teachers. You get these teacher evaluation programs. And they rate teachers on how students do.
I actually called the Louisiana department of education once and asked them if they take demographics into account when they do that. They don't. And I can tell you why they don't because I've talked to my relatives who are teachers who have been in in service training and such. They don't because the egalitarian dogma dictates that being rational about the kind of "raw material" teachers have to deal with is not allowed.
So if you're a teacher at a school attended by predominantly White middle to upper class students you are In like Flynn. And if you're a teacher in a school attended by predominantly Black, poor students you are screwed. And that is all because of the egalitarian dogma. Especially when it comes to race. You are NOT allowed to consider the fact that what we call race does matter when it comes to the scores they use for teacher evaluation.
In fact i have one sister in law who was assigned to a poor minority school and realized she was screwed so she changed jobs. And I think she was a good teacher. Or, at least, I know she cared. The egalitarian dogma does have consequences.