First of all, you are painting a false dichotomy. Plenty of people were "de-platformed" in the 90's. AOL, Geocities, MySpace, etc. banned or removed people all the time for perfectly legal actions. [Random Geocities example https://www.cnet.com/news/geocities-takes-down-site-rating-s... ]

Second, if you are building your business based on relying on a certain vendor then you should re-build your business.

Third, if your business cannot survive on any platform then you may want to re-think your business, but if you still truly love that business then go build it on the decentralized web and put in the hard work to make it work.