1 and a 1/4 inches will make a difference if you go from toe down to flat footed as it adds the choice of still putting a toe down just in a different spot.
Now if this only gets you from half a toe down after sliding across the seat to half a toe down, yes its a waste of time you either need to practice so much you stay feet up, or forget the Ewan and Charlie look and get a smaller bike.
Experiment with stopping next to kerbs or rocks or using bricks on your garage floor before buying. 30mm on the Wee turned it from barely acceptable with a pillion to usable. As I wanted comfortable the ultimate solution was the Guzzi.
Lighten the bike and practice first, shopping trips for instant technical solutions rarely work if the issue isn't obvious IMHO.