The thing with football is that there is a specific goal (pun very much intended). It’s ok to have a mindset that you’re going to play in a way that makes it unlikely (in the beginning) you’ll achieve that goal (eg play left footed), but if that player never improved, would you still think it’s ‘working’)?
I worked in an industry for many years that was obsessed with goal-setting, and that mindset never appealed to me. I eventually found a book called Goal Free Living by Stephen M. Shapiro. It was a bit of an eye-opener for me, and the phrase “Carry a compass not a map” stayed with me until today. I’ve done several different things since then but I’ll never be famous for any of them as I still keep changing direction.