The issue being taken here isn't specifically twitter as a source but "a handful of tweets" as the source. Extrapolating/exaggerating from a very small sample of views into the impression of a mass movement.

It is like asking a couple of random people if they know me, getting negative responses, and using them as the basis for an article about the mysterious Dave person who no one seems to know anything about.

> This is how people communicate in 2019

This is how a certain demographic communicates in 2019. Twitter does not represent society as a whole.

It's purely anecdotal. Nothing meaningful.

Did these people even own Fitbits in the first place? Have they even been using them recently? How many have actually thrown them away?

It's representative of nothing.

Obviously man on the street is more legitimate.