Why do some chatbots censor topics while some don’t?

I don’t understand why some chatbots will avoid some topics at all cost, while some just have a relaxed attitude and tell the user it could utter strange things at times? For instance, if the bot is built on GPT-3 the company don’t have to censor, or do they? I think I’ve read that chatbot manufacturers who provide them for companies have to make their function way more narrow. SaaS regulations affect this, am I’m right?