Sure, they can also easily replace people. Guess we just shouldn't arrest them ¯\_(ツ)_/¯

they can also easily replace labs, guess we shouldn't raid them ¯\_(ツ)_/¯

they can also easily replace ... guess we shouldn't ...

I mean yes if they can truly just replace all the labs and people for not much addition cost, then you're only hurting yourself to raid/jail/prosecute by arresting and raiding the labs because it comes at great cost to yourself while costing your enemy very little and not changing their operations.

You've just explained why the drug war failed and ultimately hurt us more than helped us while doing nothing to destroy the profits of the cartels.

If that's the argument the other fellow would like to make, then sure. But that's not the argument he's making. He's specifically taking issue with trying to add friction to small arms manufacture and trafficking.