The reason there is so much material calling pornography and masturbation harmful is because we live in a misandrist world. Per Chomsky's Propaganda Model, of COURSE it would be deemed harmful, because it attacks the matriarchal power structure. If Western men wish to destroy the feminist power structure, then the answer would be to masturbate MORE. It would be to stay in a state of perpetual post-nut clarity that would thereby cause the entire female beta orbiter economy to collapse.
The easiest way to do this is by increasing R&D into robot waifus. Robot waifus are the long-term solution to the collapse of the West. Given how females would not be able to compete with robot waifus, beta bux inflows to the misandrist economic machine would stop, completely halting it and leading to a patriarchal superstructure reversal.