I'm a high school teacher. Honestly, I think phones have become really expensive fidget spinners—our attention is lost for a second, we grab the phone because we have nothing else to do till our attention refocuses. Then we see a notification, we get pulled into an app… and we're done for.
I have no social media on my phone (I'm working on not checking my newsfeeds as often). My screentime plummeted after I deleted my Facebook and Twitter accounts (I have an Instagram account, but it's only for school-related stuff and I don't post; I also have LinkedIn, but it's LinkedIn so... ), and I'm a much happier person because of it.
And for everyone saying "iT's teh paRenTs' reSponsIBILity!!!!!1!!!": The parents need help. They have no idea where to start or how. I don't know how many I've talked with who didn't know about the parental controls in the operating systems or the family functions in various social media apps. So, before you start talking out of your rear, start by working with your local school and volunteer to do some workshops showing parents how to lock down these devices. Otherwise, if you aren't willing to help, keep quiet.