If you want to name a country that has rule of law, in your opinion, it works make your point stronger. The US isn't a particularly good example of the rule of law right now, true, but I think you would be hard pressed to come up with an example that passes your apparently stringent purity test.
If you can't point to such examples, your point comes off as trivially weak.
If you can't point to such examples, your point comes off as trivially weak.