How's your understanding of Brahms?
Seriously though, football is a form of entertainment, perhaps even comparable to art. Like many sports. I'd always argue that the more you understand what you're looking at or listening to – whether it's sport, a piece of sculpture, modern art, fusion jazz or East Enders – the more it "opens" to you and the more you get from it. Cricket is perhaps the best example of this when it comes to sport. A simple change of the field mid-over can create a great amount of excitement in those who know why the captain/bowler is doing it. Someone watching for the first time, however, might enjoy the overall experience – but would probably not even notice a bloke slowly walking out from the slips and onto the square leg boundary.
At the end of the day, though, if whatever you are watching or listening to and it gives you enjoyment (or makes you "feel"), you're all good. I watch German porn. No idea what they're saying, but I still enjoy it.