Would he be guaranteed anything at Brentford? He would have to compete for a start with Mbuemo and Wissa wouldn't he? Unless they are going full Ossie with their selection.
Probably more likely to get minutes there than here though, in the short term. By the time he has matured, if he is as good as people seem to think a bigger club will come knocking.
I get why the kid made the decision he did. It's actually a rather mature call.