Re: I guess I misunderstood the situation
"Define economy. EU has exclusive (in)competence in a lot of political and economic areas, not all of which serve UK economic interests."
The EU isn't them, it's us, or at least has been for a few decades. As long as we've been in the EU we've been in the decision making process.
"Brexit just means having UK hands on those levers, and less money flowing to the EU to bankroll EUrocrat's lifestyles"
Brexit means taking our hands off those levers. The impact of that depends on the role the EU continues to play as a suppler and customer. There are a couple of alternative outcomes after the transition period (if any). One is that they don't in which case you'd better hope those unicorns come galloping over the horizon otherwise a good deal of the economy is goingto go the same way as Honda and Scunthorpe steel works. The other is that they continue to be a significant part of the economy in which case you might then start wondering just why it was that we took our hands off those levers.