Playing lighter is one way of minimizing fret buzz, but IMO it's best to address the problem by FIRST getting a good set up. It's not always necessary to change a playing technique/style that is otherwise working for you. That would be a pretty drastic way to fix what is usually just a simple set up problem.
Part of the reason people get their basses set up is to adjust the bass to
match their playing style. It's sort of like driving someone else's car; you're very likely to get in that car and adjust the mirrors, the seat, etc., to match YOU the person who is driving.
I'd reccomend taking it to a good set up tech and explain or let them see your playing style. Let them set it up according to how you play and see if you like that.
