No, they don’t have any clue what’s being lost because they haven’t seen anything other than the flickering blue light of their computer monitor for the past 4 years.
The people least well adjusted (terminally online) are the ones online all the time upvoting and posting things and only generally interacting with others that are terminally online. This lack of interaction with other ideas leads to this radicalization and lack of care for others.
There’s no use in trying to convince the guy that hasn’t left mom’s basement in 6 years. What’s he gonna do? Get cheeto dust on me?