This is a false dichotomy. The modern style is a reaction against a distinct and different design aesthetic from what the parent described. Neoclassical, Gothic Revival, and Rococo are more ornamental, but they not cozy or comfortable in the same way.

This being said, the title is accurate to the article but misleading. The subtitle is about "Striped Floors and Flickering LEDs". It isn't modern design, it's specific elements of modern design.

I'd suggest that the striped/patterned floors/LED points transcend styles, and would cause issues even in a more ornate/classical design. Style is individual, and I expect the diversities of brains and thinking patterns means that there is no right answer for what style is best for people.

The most interesting part of the article wasn't really reflective of style, it was visually crowded environments. They used the example of supermarkets, and that seems distinct from a visually rich style like the grandparent comment's home or Neo Gothic cathedrals. Being in a forest is visually crowded, too, but I'd expect it has the opposite effect the study measured. I think the fractal dimension of the detail, if they correlated it with the degree of distress, would be a factor.