That is the reality. On a firing range, you're using real rounds at targets. On a set, you're using blanks or dummies for filming a scene. They are different contexts. It's not a mistake to acknowledge that reality. It's essential to do so in order to have appropriate safety procedures.
Under your previously stated rules, blanks would be illegal on set (because they're live rounds). Dummies would be illegal on sets (because they look like real rounds). Real rounds would have course be illegal on sets. So everything would have to be faked by actors (e.g. recoil, response to noise and suchlike) and by digital effects added post production (e.g. muzzle flashes, etc). Ammunition couldn't be shown on screen at all (because it would have to look like real rounds). How would the effects of bullets be shown, e.g. a bullet hitting an object and causing suitable damage? Would that be faked post production too? Any way of doing it during filming that looks realistic will have some degree of risk. Probably on a par with a car's airbag.
It's doable, apparently. But it would still be a very different context to a firing range.
Treated equally seriously, yes. But that requires taking into account the fact that they're different contexts.