Speaking as a low-level employee in the medtech industry, I can report that a lot of companies are satisfied doing human research in Eastern Europe, where costs are low and regulations lax, but infrastructure is still available. I have heard that there is a bit of "rotation" among these countries over time, since costs and regulations tend to increase wherever human research becomes popular.
Don't forget the Primary Election factor.
Candidates who appear in general elections are actually a subset of even partisan candidates: they are those candidates which won their primary elections. In primary elections, general-election-"electability" is sometimes a factor for voters, but its seldom the top priority.
Even considering that political desires are, as OP shows, grouped, we would still expect more moderate candidates in a system without primary elections. Rational parties would submit candidates which maximize their party's turnout while minimizing backlash and enthusiasm from opponents. Primary election voters, though, usually lack this concern.