You do realize those were made by several artists etc even if they are under Dreams circle? Don't individual artists deserve to get credit even if they are working under them if thats your stand behind credit? They are also likely to use tools or templates from other sources etc to make these things. Who knows we don't even know their internal workings.
I been in web development for 4 years and working on unity game for the 3rd year as indie with a small team, I met countless developers and you know whats the most common thing when it comes to needing assets, materials etc? They ask if its licensed for commercial use, or if its royalty free, no crediting nonsense and the ability to modify.
You see studios credited when it comes to vfx but not individuals who worked on it under them, weak argument lol. That just makes your whole argument hypocritical and mine more true because yes it is selective credit. And when studios etc make music for a game, they usually do it exclusively for that particular game so it becomes more meaningful to credit them, you don't see them selling the kingdom hearts ost to god of war etc.
Because they want it to be their work in the end and just pay for extra things, its called transformative work. Meaning you use tools and other stuffs to make something that's your own work. And in the game developing environment, you want only whos part of your team to be mentioned, people who helped you with exclusive material, or something big like AI implementation.
But you are right, in the end the asset creator decides how they want sell their asset with their own terms, I'm just saying that is a very anti consumer thing that most developers would just scoff at and go to another place with less strings attached.
Its no point arguing about this, you have a very naive and unrealistic view of how it works and its their call in the end. But just know that we live in a world where very few things is truly original or is purely their own, as I mentioned before even the stuff they used is a collective work and there are probably some things they didn't even credit and it could be anything really if we are talking about credits.
Basically the moral of this is, their terms are not desirable but its fine because there are many other asset creators who understand this and I already found a lot of good ones on the unity store 馃槉