This is the common explanation I see when this topic comes up, but it always made zero sense to me. It frustrates me that people fail to realize the amount of purchaseable things that could qualify as 'explicit'. This is
Kickstarter. Do we really think that someone crowdfunding a risque board game or comic is as likely to ask for a chargeback as some middle-aged man trying to hastily cancel a subscription on some porn site?
And there's just so many more things you can pay for. Physical stuff. Art prints and comics. Game mods. Art commissions. Services that aren't just video platforms (social media, hookup apps and so on). There's so much more stuff out there that's not child-friendly, and I bet that all of these categories have different amounts of financial risk atrached to them.
So why are all these different things grouped under the widest net, with the worst offenders being used as reason to deny processing to the entire market segment? Why did they ban all explicit content and not just porn site subscriptions or whatever else has the most chargebacks?
This comment thread is confidently trying to steer around this topic, but there is ideology mixed up in this, and probably to a way larger extent than you think.