It's not the screens to blame
Screens are unfairly tainted. I'd love to write a post about how screens are underrated, a glorious technology that would be marveled at by basically any other generation in history. Screens are the scapegoat because they are the point-of-contact, the portal through which bad or selfish actors bend your pixels to their whims. I know people lament over "blue light" and the physical strain from staring at something for many hours, and of course that is real at excessive doses, but might that then be an software or psychology issue?
The main reason I started writing this was to riff on screen-time with kids. There is a revealing nuance in the advice, "no screen time for kids below 2 years old, but FaceTime with relatives is fine." Why is that? It's not the screen, but the nature of what's on them. FaceTime is fine because there is a fix and unchanging frame of which a fixed and unchanging person moves within. There is stability and coherence. We take this for granted, but infants haven't modeled this yet! They might not even have object permanence (ie: if they disappear from the frame, are they gone forever?). So by this logic, any piece of media with a stable frame is potentially infant safe; beyond FaceTime that includes single-shot lectures, text editors, etc. Obviously an infant will not be in gDocs, but the point is, if they see you using a static interface, there is little harm, it's simply another object in their environment.
By contrast, cartoons and commercials are the real issue. To explain this to my mother-in-law, I counted out loud the camera cuts in an ad, and it less than once per second. There is a whole psychology on why they do this, which I can guess, but should probably look into. But when an infant see this, I imagine the frame resets are alluring, but disorienting. If the frame changes every second, they're locked trying to make sense of this self-evolving landscape, an experience novel and typical from every other thing they've seen. It has no continuity.
By this logic, it also explains why feeds are worse than personal websites. You just stream past 100 things per second and have no steady frame. Even though my site is feedish now, it's all from a single person, so at least that's a constant. I'd feel okay with my daughter at 5-years old reading personal websites and having her own, but I wouldn't want her to be using algorithmic social media feeds at 15.