This means good media must not be racist or sexist, which I think everyone here likely understands and tries hard to act on by ensuring that media not have racist and sexist divisions of labor, income differentials, and assumptions - but nor can good media be classist because, if it is, then it will not deal well with issues of class in society.
But not being classist means good media can’t be profit seeking, as that would lead to it being unable to honestly address matters of private ownership and profit seeking.
Not being classist means good media can’t sell advertising thereby biasing toward audiences with disposable income and away from content that will diminish attentiveness to ads, much less challenge commercialism.
Not being classist means good media can’t be organized to empower and enrich a few who occupy elite slots, while disempowering and paying much less to those occupying subordinate slots. Any media that has that old corporate division of labor will not deal well with challenging that type arrangement, or even with noting its existence.
Good media also cannot have top down decision making, whether by owners or by those who monopolize empowering work. If media has top down decision making, it will not do a good job with issues of power, and particularly self management.
We don’t have good mainstream media, and we won’t until we have transformed all of society, but we can win changes that move mainstream media in a desirable direction consistent with our long run aims