I find that advice hard to accept. I'm older so I spent plenty of time as an adult without the internet (unless you count BBSes). I use the internet to find things to do. Meetups to go to, events on facebook, events and parties friends invite me to, restaurants to go do, etc... I don't know how I would do it without the internet at this point. Maybe it used to be I'd look in the local paper like SF Weekly or LA Weekly but I live in a place that doesn't have those anymore and AFAIK even those are a pale version of what they were in the 80s and 90s

Well if it's helping you socialize, don't take that advice. Everyone's different. I'd ditch it if I could (for work reasons, for me and for my spouse, I cannot) but then texting is the most technological thing I really need to keep in touch these days, and maybe the occasional e-mail check-in or phone call, and entertainment and diversion's laughably abundant even without it so that's not a concern. If I were finding meetups and such on the Internet that'd be different.