I think the internet just feeds what most people want or our minds want. It can be in a form of happiness, agreement, entertainment, etc... It's just part of spending time on things that we like to do. It may be considered as wasteful to some, but may not since that's what we want.

There are many people who have tried to quit and eventually gotten back because life out there may be boring, at least to their mind temporarily.

Until there're some serious conditions that cripple our physical bodies, then we consider some changes.

I think it's all a part of living things. We don't normally say "why does human waste so much time on earth?"