Well, yes? Should all symbols be stripped of meaning and associations with that particular group of people that actually maintained that culture and be used just as aesthetics? Do you think that transforming these traditions into something hollow as an aesthetic is saving that culture?
For example, in Brazil, it's not uncommon to see people using the Cocar as decorations for their living room. A Cocar is a sacred symbol for many different groups of indigenous people, and it's being banalized and used as a decoration. People have been mass-killing the sacred birds in order to mass produce cocars with their feathers, and the money made from selling them often doesn't get back to the indigenous groups. At all. If you follow any indigenous organization you'll see this discussion over and over again, and how they suffer with this.
The same happens with many other things: technology, knowledge of the plants/medicine, techniques for dealing with textiles, art, etc.
Is that the same things as an online game clothing? No. But transforming traditional things into a pure aesthetic without the involvement of these groups... Well, is quite similar. It's the same process over and over again. The same mindset. This is not effective into celebrating culture.
A good example is the recent Prey movie. Which was made involving native americans in the entire production: writing, research, actors, etc. The quality is clearly different, regardless if you enjoy it. You end up being able to celebrate a culture with the same people that make this culture alive, today, and compensate them for it. It's not hard to do this today, to actually open up space for dialogue and discussion instead of taking whatever you find pretty for yourself.
In the world we live in, a game using your culture to generate money for it is far from representation. You know what's representation? Saami people sharing the profits from the mogstation, Saami artists being involved into the writing of the description or even the concept art. Speaking with cultural institutions from Saami people to know the best path ahead that can make this representation USEFUL for the people that actually make this culture alive and real and holds the knowledge of these traditions. Feeling like a game is doing good because it's getting profit from your traditional clothing without involving you in the process is a stretch.
I feel like there's plenty of discussion regarding kimonos and how you have games that dilute a culture and create a banal impression of it, even a sort of fetishization, especially when it comes to japanese culture. Have you ever searched for this? This happens a lot with japanese references in western media. Just because you haven't seen it doesn't mean that it doesn't exist. I'm not saying that getting money is ALWAYS the answer, but the clothing is at the mogstation, there wasn't a discussion before on how to include these people in the artistic process, financial compensation doesn't impress me as a given solution.
Indigenous group are not a monolith (or any group of people, really). They don't all think the same. Many people will probably not care. However that doesn't mean that cultural institutions hold no value or place in the discussion. You still don't have the right to tax people as greedy just because someone did not answer all your questions, that's quite childish. You might not agree with them completely but assuming they're greedy just because they're talking about money is a bit too much.