I've been thinking about this, and I think the problem is they are a lazy organisation that's never been tested.
They've sat there for decades, getting fat on the TV money, benefiting from the football the clubs play and the global appetite for it without actually doing anything.
They have never had to be intelligent or thoughtful about anything.
Success has come with next to no effort.
I don't know whether it's arrogance or ignorance - or a combination of the two - but now they find themselves having to make an intelligent and nuanced decision about how best to enforce these rules without the tools to do so.
They clearly don't have the capability to do that within their lazy, hubristic corporate culture.