People always say things like this until they are forced to, and somehow find a way.
(Particularly if imports were charged similar tariffs)
That is one of two possible outcomes. The other is that the sector just dies off and relocates to another place on earth, where externalities don't have to be considered, maybe for strategic reason. This has happened many times.
If you want to enact global change, you can't just change yourself, though it's always a good place to start.
And probably a major beneficiary of similar laws currently is meat production and animal welfare laws used to exclude imports.