As the epidemiologist quoted in the article points out, the sample size is too small to generalise - and he adds further, weighty caveats. But rates of asymptomatic infection, and transmission, are surely crucial to establish to inform best-practice response.
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Yes. We shouldn't draw firm conclusions from sketchy data, although we should "play it safe" based on preliminary data. More creative, ethical, larger sample-size studies on transmission modalities need to be prioritized to focus remediation. Perhaps massive testing across the populace, symptom characterization and measuring virion shedding as directly as possible. If we don't know how it spreads or what kind of carriers spread it, fear and anxiety of the unknown will only compound the situation.