Porn isn’t “empowering”, “liberating”, or any of the other BS. It is not, however, slavery.
I agree with him and disagree with you.
It is slavery because you are unable to override the desire using common sense and wisdom.
That slavish need and desire will control your body to the extent that it leads to death, disease, and destruction of all healthy relationships that make life meaningful. In thrall to base desires is slavery of a sort. It is just the definition of master that is confusing.