3- You get him to call with worse, you should probably bet 1/2 pot with all your range on this board, most of the time? Half pot three streets. So you basically give yourself more chances to fold out his 66 for example, whereas he will snap the flop if you just shove. Shoving just allows him to play perfectly, fold his air and call his pairs, that's why its pretty bad and doesn't make much sense overall.