Do you have anything to back that up with or are you speaking from personal incredulity? What you said certainly does not apply to e.g. contemporary smartphones.

Maintaining a high SoC is still very damaging to battery life.

There have been many right-wing exodus from reddit over the years. All of them have centered around a perceived “free speech” issue, and they have always flocked to the most promising alternatives (e.g. Voat). Obviously Lemmy with its origins was never seen as particularly appealing for that crowd. This time the issue just happened to touch the left-leaning part more.