Doing that completely ignores how language works; so however much it may amuse you to wander off on a tangent, it's far from the point.
Not true! It's exactly how language works. Every word I've used has a well-defined meaning, and anyone with a grasp of basic logic would understand what what I've written.
Dictionary definitions usually include a variety of meanings showing how the word has changed over the years, and how the meaning can be different according to context.
The fact that there appears to be so much confusion on the meaning of the word 'art' suggests that the usual dictionary definitions are inadequate. I've tried to remedy this situation by providing a modern meaning of the word that would include every 'claimed' work of art from the incomprehensible to the ridiculous, and from the sublime to the ordinary.
To the extent that a man-made object has a utilitarian purpose, it is not art. To the extent that a man-made object has no utilitarian purpose, it falls into the category of art.
Sometimes the two purposes are in conflict, as is the case with many styles of clothing, particularly women's shoes which are sometimes designed to appear like art, that is, expressive of elegance and beauty, but as a consequence have a diminished utilitarian function for the purpose of walking. Such shoes can pinch the toes, distort the feet over time, and can be very dangerous for running.
What's not clear?