With respect Plumage .. your intent is good and right , but is based on the assumption that these travellers came direct from Korea/China AND answered all questions honestly etc etc .. which IMO is highly unlikely , because if they were answering ALL the questions truthfully they would very likely be turned back when they told Border Controls that they are coming here to join the sex industry for 3 months , not "study" .
Misinformation is harmful, agree 1000% , but caution is better than confinement for those of us who might contract this Covid19 from so e 'student' .
Also a high temperature is not necessarily even seen on a carrier , and the 14 days is not a guarantee of safety .. facts.