If one can’t know for themselves that #graphaneos is very secure because they lack the knowledge and tools to do so, doesn’t that make any OS secure as far as they are concerned ?

For example I have no idea how iOS is less secure compared to GrapheneOS. iOS claims they can’t have my info as I have enabled advanced data protection.

I know some people here will say grapheneOS is open source and audited etc. All those don’t meant anything to me as I can’t verify them myself or make sense of the implications.

For a commoner like me, iOS feels good enough. What’s a good way to compel someone like me to stick to grapheneOS? In what way can a real world difference be shown to me?