We have digital assistants that can match photos by time+location+people and create complex results, why OSes don't have (natively) elaborated and user friendly

We have digital assistants that can match photos by time+location+people and create complex results, why OSes don't have (natively) elaborated and user friendly alerts/solutions when apps do detrimental stuff like that? We can blame Slack in this conversation but I think an equally interesting discussion resides on the OS side, who can avoid not only Slack to be so detrimental. I think UX sometimes get too much attention on the flashy/entertainment side and performance/speed is overlooked (look the state of websites).