Your generalities are irrelevant to the case at hand. What exactly about the state requiring their employees to pay union fees hinders interstate commerce to the point of triggering constitutional federal action.
The Left has argued for the past 100+ years for continuing and sweeping government expansion with no constitutional basis for doing so, but they have consistently used the same arguments you have used - that the Constitution in text, intent, and original understanding is somehow unknowable. THAT is why I call your argument “Leftist”.
“...the Constitution in text, intent, and original understanding is somehow unknowable.”
I never said anything like that.
There are issues which demand more than shouting “the tenth amendment” when they are raised.
I have not read the findings of the case being appealed so do not know exactly what the appeal addresses.
The case does not address interstate commerce but the violation of the constitutional right to free speech which makes it clearly a federal issue.