I do think, that for some, studying the natural sciences is a way of studying the work of HKB”H. Certainly for myself, this is the case.
However, this does not mean that a study of the natural or any other sciences is itself enough.
I feel that learning (Torah) is too important to be left to those in Kollel. It is something required of everyone–but even without the requirement, it is the essential component of understanding the purpose of our existence, and what is required of us.
Learning any subject alone, with no context, no relations to any other subject, give a view of the subject akin to tunnel vision. While tunnel vision excludes anything outside the tunnel, it does not increase the clarity of view inside the tunnel. It only subtracts, it does not add.