Just because all art forms accepted (except photography) can start from nothing doesn't mean that everything that is started from nothing is art. Assuming so would be a logical fallacy. Art also has to have a creative element and be aesthetically pleasing to at least some people (most art is aesthetically pleasing to a small fraction of the population).I won't argue your opinion is wrong as long as you're also fine with others seeing things as art that you don't.
But I'm curious about a thing. You said logic plays a big role in how your opinion is formed. And that art is the act or product of taking something, which has a shape or character that you consider 'nothing' (Like a blob of paint or lump of clay) and giving it a shape and character that you came up with. That's how I understand your position.
If that is correct, it is incomplete, as it doesn't exclude things like the dishes in my kitchen or the chairs in my living room from being art.