> I'd like that security model to be the default for desktop apps on my computer as well. Its weird that davinci resolve and spotify and all the rest have full access to look through all my files.

That's how it works on Ubuntu, proprietary apps are usually distributed through snaps which are sandboxed. And unlike on mobile, the OS doesn't have an advertising ID or built-in ad networks.

Normal apps don't need that though because there's a chain of trust which doesn't exist on mobile.

> Probably just because so few regular people use ubuntu, scammers & malware authors don't bother targeting it. Still good for your parents though!

No, it's because the bar on publishing on Ubuntu is much much higher than on an iPhone. Nobody would ever accept those scam casino games on Ubuntu.