the vast majority of internet traffic is porn and substanceless meming and shit posting

Don't confuse your personal experience with the general case.

Disregarding the irony of your authoritative stance, as it is your opinion...It's not only possible but better to do both?

I'm with you on the TL;DR that equals mindfulness is more work than virtue signaling, but did you consider that internet arguments,(communication) are as intrinsic to the human experience as porn and memeing?

You can work a job that helps others, volunteer in your local community, and practice mindfulness while attempting to elevate and spread good vibes to others.

I don't recommend anyone try to do all of them at the same time, and in the case of jobs that's not even a healthy consideration in the face of modern life pragmatics. Which we should change yes, but that's another discussion.

Your observations are valid, and correct. For everyone. But it's a "some of the time" thing; It takes practice and support to become the kind of person who can actively choose to put aside those coping mechanisms.

How did you come to the conclusion that people meming on the internet are trying to create a better place? They are probably only after recognition.

Noooo we need unelected bureaucrats to tell us what the truth is.