Unless you're making the very silly statement that because no one can do it, that it somehow changes the line of what is actually safe.. Then the same thing has been said and you're not actually arguing like you think you are.

Now, if you are saying that... Then you're having a different conversation and are either intellectually dishonest and trolling or just lacking in reading comprehension

Either way, the only actually objective safe value for consumption with lead is 0. Anything above that has risks involved period. We can't achieve 0 though, so there is nothing to do but determine a threshold that will be the most acceptable and that is determined by regulations. Since it's established we CAN'T, there is no other option. But there is still risks and is harmful regardless of regulation. Tangible evidence that any amount is still harmful and every decimal point above 0 that it is, the higher violence is in a community over decades. So...

If you're still struggling don't bother responding, I can't help you if that was too far above your head lol