I mean sure, but the argument of "people will just try and work around it" can be made for basically any regulation ever put in place. That doesn't negate the importance of the regulation, and it doesn't make the regulation ineffective. It only acknowledges that the game of cat and mouse between regulators and the people playing the game exists.

It's in the same vein of "criminals will just find a way to get guns if you make guns illegal". Some will, certainly, but the argument itself is an argument against the rule of law entirely. Some criminals will speed on highways, some criminals will steal, etc. But laws are still effective in curtailing this behavior on the macro level.