That is an excellent point. Ditto cricket - Was it a no-ball? Was there bat involved? Did he make his ground? These are technical issues that can be solved by technology nearly 100% of the time with total accuracy. Not so for football. Was that handball accidental or deliberate? Well you tell me.
Currently that's my view as well. We've always said that in principle it's a good idea; after all lots of other sports have it so why not football? What has always sunk it though is the next question: "Yeah, but how would you deploy it though?" It must be blindingly obvious to even the most...