You made some good points. It’s certainly more realistic than every single developer suddenly learning not to put a novelization of their games into the description. ;) On top of that, it sounds like something that could be implemented without too much effort or too many disruptions. (That being said, I have been wrong with such estimations before…)
And just to let you know: The option to display the download button above the game description already exists - it’s just that not every developer takes advantage of it, even if they should.