We are talking about what change involves on an ontological level, which is the movement from potentiality to actuality , and this is what Thomas is concerned with and is the reason why he infers a being that can give actuality to the motion of things and their potential reality.
Show me just
one instance of “movement from potentiality to actuality” which does not involve a physical change. What is potential can only be known if the object is analyzed, and its physical characteristics are determined. The Thomistic “potentiality” is meaningless without analyzing the actual object. (Just like any other metaphysical concept.)
Metaphysics without a corresponding epistemology is meaningless. Yes, maybe someone will argue that this is just another “metaphysical” statement, but that would be wrong. It is an epistemological proposition.
So you are a proponent of scientism. You think scientific knowledge is the only kind of valid inferential knowledge. Only that method can be trusted.
Whatever “scientism” means.
There are two
objective aspects of reality: “the physical aspect” and the “abstract aspect”. Using other words: “the inductive” and the “deductive” methods. The deductive method rests on axioms, and a proposition in a deductive reasoning is true, when it is a logical corollary of the axioms (using the allowable methods of transformation). In the inductive part we start with observation, set up a hypothesis, and conduct experiments which either verify or falsify the hypothesis. There are no other objective epistemological methods. You may disagree, but you need to argue for it.
The subjective part is just that:
subjective. A proposition like “this woman is beautiful” is neither true, nor false in the objective sense. This is the question of aesthetics. Then there is ethics, which does not deal with “IS” statements, rather with “OUGHT” propositions. Ethical propositions rest on a chose ethical system (of which there are many) the details of that ethical system.
And then there is yet another possibility: propositions about something
that does not exist. It could be about the past, about the future, or about a totally imaginary “object”. How can you determine if a proposition about an imaginary object is true or false? Do you have an epistemological method for that?
Finally, there can be propositions about something that does not exist, did not exist and will never exist. Molinists may call these “middle knowledge”.
So your accusation of “scientism” is without merit. I could continue, but I pass the baton to you.