"the lack of a good lenses system" This is very much a subjective interpretation and I don't mean to be picking at nits, however most smartphones have tremendo

"the lack of a good lenses system" This is very much a subjective interpretation and I don't mean to be picking at nits, however most smartphones have tremendous lens systems. They just happen to have a short focal length (e.g. 1.54mm, 4.25mm and 6mm on the iPhone 11). Depth of field is primarily a function of focal length, and the smaller the focal length the larger the depth of field. Which is why portrait photographers often use zoom lenses. In the real world though 99% of the time what people are aiming for is simply sharp photos where the subject is in focus. That small focal length makes that much, much more likely, yielding a dramatically higher percentage of "keeper" photos. Shallow depth of field photos are a gimmick in most cases.