I'll second this opinion. A lot of people will already have their passwords saved in their browser but not even realize that this is an example of what people mean when they hear "password manager". I'm not sure about iOS (as I haven't owned an iPhone before), but at least on Android, there's a setting to let the Chrome password manager auto-fill across the entire system rather than just in the browser. The path of least resistance for most people is probably just to turn settings like that on (and optionally, if their existing passwords are not secure e.g. due to reuse across sites, go through their list of saved passwords, log into each site, and change their password to one generated from the browser password manager).
It doesn't on iOS. Safari does _sometimes_, when it feels like it… but even if it were consistent, who (even in the family) wants to use Safari on desktop? Back to square one