You're right about how it works, and it would get really expensive to do what you're suggesting. But that's not really what you're supposed to do. You move on, away from the table (as it's riddled with bullet holes), or stay behind it and return fire. Either way, you're not just sitting there using the Aspect...the Aspect buys you time to do something else. Fights are supposed to be way more cinematic than just taking cover behind a table for five rounds occasionally returning a single shot's worth of fire, you should be either taking the gunman out or working on your cunning escape plan to avoid dying.