Ironically, if nobody but Google can benefit from Section 230 immunity, because people must obey Google's content moderation rules in order to remain viable in Search and Ads, then it's even more fuel to remove Section 230 to level the playing field.
That is literally nonsensical. Section 230 means you need to sue the actual speaker of the speech and not where they posted. Google could start acting utterly insane (which would rapidly give rise to competitors) and that wouldn't compromise Section 230 at all because Google is not the court system!