Well the chief dangers seem to be
(1) You will age quickly
(2) You might get shot
That’s about it. People of good will (in the Lord) ought to consider such a sacrifice.
3. Your family is under a microscope.
4. You have no private life.
Are YOU willing to put yourself out there and make that sacrifice? I don't mean that as an attack, but it's a lot to ask. Personally, I think I'd make a great president. But would I want everything (real or perceived) I've done wrong in my life out there? No. And I've never been arrested, been accused of a crime, etc.
It is a LOT to ask, at least of decent people who are not perfect and know that their personal destruction will be order #1.