Here's why you're completely incorrect. If you buy the AirPods, you buy them because you like the fit of the EarPods which more or less never fall out and only do due to wire swaying eventually teasing out the bud, or snagging. For someone who the EarPods fit very snugly with, I ask you what kind of 'bump' were you talking about? What kind of pedestrian bump could inflict such inertia to my head that snug wireless earphones which weigh hardly anything fall out?
I can headbang with EarPods, with the wires swaying and they still don't fall out. Wireless will stay in even better. Just to reiterate, nobody buying AirPods has a problem with the fit of the EarPods.