Earlier quoted context omitted.
They were plenty capable. They didn’t want to.
If the government is enforcing the law, they can't do that because it has been illegal for a thousand years. If the government isn't enforcing the law, what good is a new law for them to not enforce?
Striking workers were usually on the wrong side of the law though because they were using coercion and force to make every worker to participate in strikes (they could hardly work any other way without laws restricting “right to work”)