Is this pre-censored like their other later models?
Fine tuners will quickly take it further, if that’s what you’re after.
I seem to remember the issue with 2.x is that they removed all the commercial art from top-notch illustrators from the training data due to the backlash, so it was just way worse at generating great-looking things, which is all the user cares about. So the community stayed on their custom-trained models derived from SD 1.5 (which, yes, often included porn).
What you said also happened, but the main thing was the base model didn't have a great concept of human anatomy. Apparently it was really hard to train for anything else as well.