It's rare that Reddit bans nsfw content, the only major porn ban I'm aware of is r/jailbait and that one was banned for very good reasons. r/TheFappening and r/creepshots weren't porn but sexual exploitation.

In any case, these three bans were many years ago.

It wasn't an outright ban, but they removed nsfw subs from /r/all this year.

Reddit has more recently banned NSFW subreddits that were considered excessively violent (/r/struggleporn) or pedophilic (/r/ageplaypenpals, which was just text based).

These are niche at best, definitely not "a lot of the porn content".