It can be effective, without being the best. In-close grappling is what Judo is mostly about. We have a wider range (striking, distance grappling, weapons), so it's unsurprising that Judo is stronger within their wheelhouse than us.its only a strengh if it effective,what are you going to compare it effectivness against if not judo?
If someone can bench 400 pounds, he is strong. Just because the next guy benches 550, that fact doesn't change.