NSFW doesn't mean literal porn it means "what would be potentially catastrophic for the prudes at work to see on my screen out of the corner of their eye".
As it turns out, anyones' loins falls under that definition because vivimos en una sociedad.
And taking a scythe to anything with that tag is much simpler than actually being an arbiter of what is and isn't "degenerate" porn for the sake of this batshit prudish regime.
As a horny pedant I need to tell you that's not why Betamax failed.