Sure, and you can steer a heavy slow moving motorcycle by leaning. That's also not what people mean when they say you steer a motorcycle by leaning. Just because you can do it (under some conditions) doesn't mean that's how how steer a motorcycle. Especially since most people are under the impression that you lean into the turn, not out of it.

But yeah, hypothetically lower inertia = more ability to steer with weight, obviously.