Apparently it's allowed via the official mobile app.
https://techcrunch.com/2023/05/12/reddit-will-allow-users-to-upload-nsfw-images-from-desktop/
It's a corporate us vs them mentality. I don't think Steve would even ask his own employees for help - the people who are on the ground running the company. The internal memo strongly indicates that Reddit doesn't have a two-way communication channel with leadership.
Cannot be done for lawyercat reasons.
I can't say for sure, but I suspect they are trying to push nsfw in-house for the sake of monetizing it. Nsfw drives quite a bit of traffic, and with the falling out of Imgur, Reddit itself has become the primary host. They just can't say their intentions publicly because Reddit has a bit of problem with non-consensual material.
Here's me who has been playing games on SSD for the past 8 years. Just wait until they start requiring M.2 with specific read/write speeds. :)