Even if speciation was not being inhibited by the same processes that cause extinction and was proceeding at normal rates, it could not compensate for the extinctions projected for the next few decades rapidly enough to be meaningful to humanity. Plants are frequently ignored or undervalued. There may be more species of insects, but not more diversity . Second, I don't think most people would be happy losing the species we currently have, even if they are replaced by new ones. I think there is a lot of confusion about facts and behaviour.
Facts provide our surest, most solid foundation for action.
It is detrimental, and completely unnecessary, to compromise on matters of fact. The confusion arises when we consider actions . Believing that facts imply that certain actions must be performed, some people compromise their statement of the facts. We may know that a given development will drive a species to extinction, but what we do about that fact is still a moral decision. People who are profiting from a situation are amazingly resistant to learning facts that might persuade them to change.