"Can't have bad things happen to my character", "can't crit fail, that's not heroic", blah-blah-blah. If they have them as a resource, the players will (ab)use them.
I had a player whose character was a Batman-type. Lots of gadgets and training. Wasn't adverse to using the guns of downed thugs when he could. Only downside was, every time he picked up a dropped gun, his dice hated him. Every time he shot, he missed. He missed badly. Up to and including hitting a hostage he was trying to save. Had we used hero points none of that would have happened.
Dice don't mess with your game flow. The dice ARE your game flow.