Electric toothbrushes do a better job of cleaning. The rotation/oscillation is better than what you can do manually. So the motors do a better job with less gum

Electric toothbrushes do a better job of cleaning. The rotation/oscillation is better than what you can do manually. So the motors do a better job with less gum damage. That doesn't explain having to attach BLE and an app, other than upselling "features". Brand stratification and segmentation is a thing, but it's not a "scam", any more than any other marketing techniques.