Do you think Lebanon's sectarian system is an acceptable democratic arrangement? It might be the only way to get disparate communities to share a single state. It worked pretty well until the Israel/Palestine conflict spilled over.
Northern Ireland's political system is also sectarian in ways that make me very uncomfortable and lead to political gridlock, but again it may be a necessity.
And then there's the Low Countries' now obsolete pillarisation.
So, yes, why export Jeffersonian Democracy? The principle of self-rule and self-determination is an entirely different beast. Can the last politician to go out the revolving door please turn the lights off?