I am saying that they should already have a "training time allocation" built into their role and that they could choose to use it for remedial skills. That is, individually having time for training should be a moot point.

Now, if the business can survive in the meantime is a different matter. But the business has no choice in the matter. And the business is not alone in the matter. Which probably makes that a moot point too.

I don't claim that it will be easy. "I can't train people" doesn't compel me as a broadly satisfactory counterargument for the above reasons. That sentiment itself is not charitable making it hard for me to read it charitably.