Good question.

Currently, the USA has a democracy that allows people into high positions of governance without having experience in governance. So if this same system is retained, it is doubtful the platitudes "good character" and "capacity for governance" will accomplish much.

But if we have a new system, then maybe we can make this sayings work.

You might be interested in this new system. Here's a good place to start:

https://medium.com/tiered-democratic-governance/the-inspiration-for-a-new-democracy-109832562d66