I think you’re overestimating the market for such models. Most people don’t want a model that’s prone to generating extremely offensive output. If you want something “uncensored”, then open source models already exist, as you say. But the model itself has already been extensively tuned to produce desired outputs and not produce undesired outputs, so it doesn’t really make sense to distinguish “uncensored” raw models from “censored” apps or harnesses.

There’s a big difference between uncensored models and those that are specifically set up to only output things a panel of wealthy ivory tower Bay Area progressives would deem to be the “correct” or “inoffensive” take on a given topic.