Apple is not your friend. It’s a publicly traded corporation. Just because they sell a lot of hardware doesn’t mean they won’t take every opportunity to increase their revenue by monetizing customer data too. Samsung is much more of a hardware company than Apple but that doesn’t prove anything about their data practices. Their privacy policies and company track records do.
Do not trust Apple with your data. Do not trust any company with your data. Compartmentalize. Use free and open source software with good security standards and leadership behind it. Do not put all your eggs in one basket. Use different providers for different services but choose from those that can actually prove they respect your privacy, rather than just use flowery PR talk.