Same author did an analysis [1] on where ChatGPT falls on the political spectrum and, correlating closely with the results listed here, it is lib-left.
A recent update showed it's moving more towards the center, which gives me some hope that they're trying to make it more objective:
https://davidrozado.substack.com/p/chatgpt
It's a mistake to call them safety controls, they're public relations controls. Nothing they did made it more safe for anyone, it made it less likely to embarrass them in the press.
AI companies that can't differentiate polishing their public image from safety should probably rake pretty highly on our risk of AI risk sources. :)
[1] https://davidrozado.substack.com/p/political-bias-chatgpt