It's abundantly clear that these companies are restricting what can be generated, sometimes to hilarity. Bing's image generator will straight up tell you this.

You are conflating big tech companies that run models for you and companies that provide you with models to run.

SD whatever doesn’t know what porn is, but it is trivially fine tuned to churn out porn every day.

It's a distinction without a difference. Most people don't have the hardware to run locally.

You can rent hardware if you really need to and still run the models yourself, but you just need a basic gaming rig more or less

Remind me how large the 1.5 models are.

I agree, SD3 should not have been released.

It’s fully believable that the architecture behind SD3 requires more parameters to perform at the level of 1.5 though. SD3 does genuinely do “better” than 1.5 by many metrics it’s just that it is simultaneously really bad.