The wicked theses is: if uselessness served a purpose, it would still be useless. Adjectives do not change the substance of the noun, they only splash it with tomato ketchup. A weapon that does not wound, doesn't stop being a weapon. Nominalism was a phenomenon that characterized the Middle Ages... of which we have not left. If universals did not exist, then neither would, for example, weapons… So what we must worry about is if we are still in the Middle Ages...
There is nothing that does not serve a purpose for something in this world, which is in fact a huge workshop, where there are only tools; I mean, even those who use the tools, are in turn, tools for others. Tools, tools and more tools.