Or are you recommending that one opt out of a good portion of society by not using a smartphone? For most people that is not really a convenient option.
When people discuss android security issues its mostly about the guy who installed random app from gods know where and got into trouble
Project Zero people have worked very hard to harden the core system. That doesn't completely eliminate 0days but makes finding them much harder.
Also has the downside of increasing the attack surface, but yeah. I feel like it's potatoes grown from "seed" potatoes vs. potatoes grown from actual seeds.