I struggle to take anyone seriously who says that "being on your phone" is some sort of enormous problem. "Being on your phone" isn't an activity - complaining about it is like saying that someone's going too many places. If they're driving around to different strip clubs all day, maybe a problem. If the places they're going are their kids' soccer games and doctors appointments and picking up groceries and having dinner with friends, that's perfectly fine.
My phone has basically the entire recorded history of human knowledge. It has the ability to communicate instantly with people all over the world. That's a lot!
I own an ecommerce business, and on a typical day I'll check in on sales via the Shopify app, correspond with customers via Gmail and maybe take some photos to post on my business' social media accounts. I also use my phone to call and text my parents, wife and friends. I probably spend at least an hour every day reading news on my phone. And yeah, sometimes I fritter away time on Reddit.
People love to criticize when they see others on their phones in public, but you know what? If I'm sitting somewhere for a few minutes with nothing to do, I can pull it out, fire off a few emails, and then have a few more minutes to pet my dogs when I get home. My dogs deserve those extra minutes. They're very good dogs.
A phone is a multi-functional tool that can be incredibly useful (or also a way to waste a ton of time), and criticizing people for using that tool without any idea of how or why they're using it is silly.