> Section 2. Congress shall have power to enforce this article by appropriate legislation.
The 13th amendment specifically mentions penal labor as an exempt form of slavery.
Take your criticism to the authors of the 13th amendment, not the people who bothered to read it.
So do you agree or not agree that mandatory penal slavery is an extension of 19th century and earlier American slavery. Because that's what the movement and rhetoric are saying. And removing the Exception Clause won't change the rhetoric, because the entire point is to argue "things haven't changed".
It's the same rhetoric that equivocates "wage slavery". All those things can, of course, fall under a literal definition of slavery. Just like all forms of misbehavior by politicians can be called corruption. We can say, well, Trump isn't doing anything every other politician hasn't done. Which can be literally true. But I choose not to play semantic games like that, because those semantic games are at least as likely to be used to excuse abuses as they are to prevent them. If you want reform, pursue reform. Note that many states have removed their state constitutional Exceptions Clauses which by itself resulted in zero changes to the status quo, because when you play semantic games there's always room to redefine things on-the-fly, or to find another semantic loophole. Every court knew what the Exceptions Clause actual, contextual meaning was, and can just as well redefine slavery or non-slavery to exclude or include penal labor. Semantic games don't change the real world, except insofar as they promote cynicism, confusion, and disengagement from substantive issues.
I agree that mandatory penal slavery (as practiced in US prisons in the 21st century) is an extension of 19th century and earlier American slavery.
The norm now is to require a wage for mandatory labor, but of course often it's just a pittance. But even if you required minimum wage, many criminals owe restitution, so it could just be taken away again.
Many US states have penal labor systems just like in Europe, that is nominally opt out, mandatory wages, etc, but at the end of the day it's always open to accusations of coercion and claims of "slavery".
The rhetoric around the 13th Amendment is exactly why we're in the situation we are now politically. Everything is equivocated to maximize rhetorical impact. Every unethical thing a politician does is "corruption", so when you get open and egregious corruption as with Trump, people can't discriminate and assume it's all the same.
Was penal labor abused to roll back the clock on abolition? Yes. Is penal labor abused today? Yes. But calling it slavery, drawing parallels to chattel slavery, is just irresponsible.