The reason we're launching o1 pro is that we have a small slice of power users who want max usage and max intelligence, and this is just a way to supply that option without making them resort to annoying workarounds like buying 10 accounts and rotating through their rate limits. Really it's just an option for those who'd want it; definitely not trying to push a super expensive subscription onto anyone who wouldn't get value from it.
(I work at OpenAI, but I am not involved in o1 pro)