What worries is that they're often so close to the truth that people start taking what it tells them at face value without stopping and thinking to double check.
Not only on the OpenAI UI, but also via the Cursor IDE which I actively use with an OpenAI API Key.
Even if you don't use the OpenAI UI you'll likely end up using the produce via other products. Github Copilot, Arc Browser, Duolingo – likely more in the future – all use GPT under the hood.
I run Ollama.ai on my Mac with a variety of models — usually Mistral-7B. It’s fast and gives pretty good answers.
If you have issues with OpenAI, try those.