I'd prefer this not turn into some political discussion. Both sides, or really all sides, use these techniques to sway others.
Outside of politics, plenty of others use statistics and data, often in a small dose, to attempt to manipulate others, win an argument, secure funding, drop funding, force a decision, etc. Kids do this with their parents. Parents do this with kids. Neighbors do this, friends do this, enemies do this.
My point is more that disclosing more data and being transparent is a better way. If your argument has merits, disclosing more statistics doesn't hurt it. Or maybe it's just too hard.
I think most of the time the world is gray. And when we argue or want to convince someone, we don't like gray. We want more black and white. We want a preponderance of the evidence. I think often we're in that 55-45 or closer range with many arguments, which is a difficult place to be for many humans.