The distictions between made "deleting the accout" and "just stop using it" are really mute. The main point is to disengage from such platforms.
Of course, almost no will. In spite of the clear conection between these platforms and individual mental health, and even more importantly massive distribution of seriously mileading "fake news", most people quite frankly just don't give a shit.
Look at the near total indifference to the petro mafia's distruction of the natural world. Most people just can't be bothered.
So when you compare something like failing to respond to corporations eliminating the ecosystem services required for life on earth, to a call to action against the crimes of asocial media, do you really expect a significant number of people to care?
I'm doubting it...