if there is a compelling story-based or character-based reason for doing so... then it's fine to do this every now and then.
but it has to make sense based on the characters and their history.
when W'Kabi and Nakia both try to make the argument to T'Challa that Wakanda should be more proactive and interact with the world... they're doing this because they believed that T'Chaka was wrong to be an isolationist. while they were not DIRECTLY calling T'Challa out on his privilege... they were doing something very similar. they were arguing that they should be actively using their privileged position to help other people more than they were already doing.
in that scenario... it makes sense and works well within the context of the larger narrative.
as for the article: the following quote exemplifies why I think it's frivolous exercise in class anxiety and hand-wringing.
"The DC universe is full of heroes who can fly, deadlift tanks, and break the sound barrier with nothing but their bodies, yet Batman remains the most popular DC hero by far because he has the superpower that every person seems to want: vast wealth combined with zero obligations."
the author is making an assumption about why millions of people love this character. and it's an assumption that's simply not true. the wealth is part of the Batman mythos. but there are people who don't give a crap about money that still enjoy these stories. if I have enough food to eat the foods I like and live in relative safety and comfort... I'm not gonna lose a minute of sleep if somebody out there makes more money in a week than I'll ever see in a lifetime.
besides, that statement ignores the fact that Batman CREATES his own sense of obligation towards the city. just because his civilian alter-ego is somebody who was born into wealth, and nobody expects much from him, doesn't mean that the character has no obligations at all!
I've seen Marxist-inspired critiques of Batman before... when the Keaton Batman movie came out some people complained that Batman is more concerned about property rights than inequality... because he's saving some rich people from getting mugged. guess he was just supposed to stand there and watch them got robbed? maybe he should have only intervened after one of them got murdered!
this article seems to be complaining that Bruce Wayne isn't Che Guevara, Friedrich Engels, Mao Zedong, or Pablo Neruda. I mean, they have movies about those guys. go watch them! people don't expect that sort of thing when they're watching a movie about Batman.