Much of mathematics is understanding precisely what a word means, the intricacies of what makes this thing unique from other thing. How is a square different from a rectangle? What differentiates a prime number from relative primes? I appreciate this precision and I enjoy exploring the edge cases and being able to place my hands firmly on those edges.
Outside of mathematics, things are different.
To use labels, we operate under the assumption that we have the same working definition of a word. In my experience, that is a bold assumption to make.
My understanding and definition of queerness, masculinity, gender expression are not the same as yours, which makes it difficult for me to claim labels, because while I know what these mean to me, I don’t know what associations and assumptions you will bring to them.
These are not concepts defined with precision. And that is the beauty of them.