It’s not ridiculous, but there isn’t a direct cause and effect either. But… the county set up is the flag ship, it attracts the attention and garners the publicity. Without that you don’t get the amount of kids coming into it. Yes, there was a senior championship in the 90s and 00s but the standard wasn’t great.
It’s not an either or situation, but both need each other and should work together and seem to be doing that (in Dublin anyway).