@fatboy a very good question indeed. Her in NL it's the main (even only) choice for people to use. Tried to convert some people to use something else, but it's a hard sell (even when they are fearful of FB).
And I have to admit, as one of the organizers of some groups (volunteer thingies) is hard to leave, like some suggested in your earlier comments...
Alternatively: leave a phone with WA at home (and only use there), and use another phone with Signal/Wire/...... on the road.