I understand your concern, and it's valid. However, I don't entirely agree. A lot of what he says seems logically sound. Personally, I can't imagine ever using a closed-source OS again. As an African living in Africa, I see iPhone and the likes of Huawei as two sides of the same coin... Interests can vary based on the context.
We all know open source like graphene is top tier for hardcore privacy. However the general public will never learn or install alternative operating systems. Never gonna happen. They buy a phone and use it as is.
The real choices for 90% of the public are manufacturer customized Android, or iOS. I will always recommend iOS between the two, it’s far more secure. Ask cellebrite or the NSO group. If you’re an “at risk” individual, turn on lockdown mode and advanced data protection. Regardless of jurisdiction, nobody can decrypt your data.
All comes down to knowing about the tools
Now you can buy degoogle phones straight out of the box. Rob also mentioned these guys. I agree that grapheneos is the best choice but generally I prefer that people start their degoogle journey with other options and move to grapheneos at a later stage
https://shop.iode.tech/