I have noticed, it appears like it's not uncommon for there to be some wires crossed in discussions about porn. Something like:

• Person who opposes porn: thinks everyone is talking about porn involving real people being filmed/photographed in sexual scenarios

• Person who is generally more open to its existence (but may still share the opposition toward porn involving real people): thinks the discussion is about any and all sexualized material, including cartoon lewd drawings, smut writing, etc.

Like I can easily see reason to ban selling of the 1st one, to de-commodify it as much as possible and help people who might otherwise turn to it to make money, make sure they'll never feel pressured to go for that option.

The 2nd one, OTOH, the production of it can be a much more impersonal thing. It can still be harmful in the sense of misrepresenting sex and creating unhealthy expectations, reinforcing misogyny or things of that nature, enabling overwhelming yourself with too much novel stimulation (in the high speed internet form of it). But it's not inherently of a particular ideological bent and is more an enabler of fantasy than it is presented like a depiction of real sex. I mean, how many woman readers of Fifty Shades of Grey actually want to be in the woman's position? None, because fantasizing about something isn't the same as living it. Those kind of stories are not meant to be something you would actually want pushed on you. Part of understanding sexuality is understanding the nature of consenting roleplay, and the difference between a fantasy and real life. I think it is a subject that is severely under-studied due to stigma.