You have targeted/caught big fish from tricky waters Nick so you know all about the dedication required. That comment surprises me from you.
I always smile in my trophy shots. Some don't. I do not believe that should open them up to questions about their source of motivation. Those who have been there and done it should know full well that numbers and sponsors are simply not enough to put yourself through what it can take to catch some of these fish. End of the day if you don't ABSOLUTELY LOVE the thrill of the chase, the highs and lows, the hardships and the successes..... you simply will not succeed in targeting big fish (unless you choose to fish and instant big fish water full of fake bigguns - which will no longer get you a sponsor in this day and age).
Imo the suggestion that numbers and sponsors are on the mind of a guy that has just caught a fish he's spent weeks/months/years working for is quite ludicrous and for me shows a massive underestimation of the dedication these guys posses. Those that have not been there and done it should have a go before passing judgement on those that do. Targeting big fish is tricky, it can be rock hard in fact, and most simply don't enjoy angling enough to hack it.