Actually, it's quite the opposite. When done correctly, this is arguably the best acoustic treatment approach possible. It allows only direct sound and very late reflections, achieving a rare combination of clarity and spaciousness: precise imaging from the direct sound, paired with a natural sense of depth from the late reflections.
If you look at the impulse response of Blackbird Studios (the studio in the third image, bottom), you can see an exceptionally clean impulse response alongside a highly consistent direct sound and reflections profile. For more on the underlying principles, look into ambechoic chamber design.
Here is the impulse response of Blackbird studio:
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This is pretty much textbook perfect. This is exactly what ambechoic chamber design is about : you're not killing the room energy entirely like a dead absorptive treatment would instead, you're scattering it into a controlled, uniform late field. The ear interprets the strong initial peak as a precise, localizable source, while the smooth diffuse tail adds spaciousness without muddying the image.