How does a primary help with the "conditions changed" part?
As for electing questionable leaders, no, primaries don't necessarily address that either. If you look back through US presidents, you can find a good sampling of really bad choices. (Season according to party preference).
I don't think that second part is completely fixable in democracies. I do think some systems are more vulnerable to it than others, and primaries in a first-past-the-post world are one of the worse systems.
As for electing questionable leaders, no, primaries don't necessarily address that either. If you look back through US presidents, you can find a good sampling of really bad choices. (Season according to party preference).
I don't think that second part is completely fixable in democracies. I do think some systems are more vulnerable to it than others, and primaries in a first-past-the-post world are one of the worse systems.