I completely agree. And what a great job stating the problem! Bungie presented a puzzle and gamers found a clever and direct solution. Improve the puzzle. Don't just make the strategy illegal. Don't just choose the most expedient thing you can do. This game overall has a number of errors in its incentive structure. From loot caves to AFKERS in strikes to poor story to this issue: there seems a lack of foresight into the economy of the sandbox and game theory in an economic/mathematical sense.