What you're describing is essentially what sparring is in boxing. The only difference is the "dancing around" jabs and feints are used to make the rushing in and unloading more unpredictable. When skill is involved you have to use a little more strategy. Morning in with guns blazing will get you knocked out. Not to mentioned a guy will just cover up and clinch.
No disagreement here. What I'm saying is the WC fighter shouldn't be dancing around as well or moving in and out. And yes, moving in, mindlessly attacking is nonsense....chi sau training teaches how to navigate through defenses and also how to deal with clenches.