All new fish will be under stress to begin with just by going from one system to another...as well as being netted and bagged. Whether the tank it goes in is cycled or brandy bare won't do much to relieve any of that stress nor add. So long as the pH, temp and SG
are correct, it's good to go.
from my experiences with fish and QT, I still opt for the bare, non cycled tank doing extra water changes to keep ammonia from registering. Some do use cycled QT but also have a third tank for hospitalization...which is not cycled. To keep a cycle active you'd have to keep a fish in the QT at all times which can become overly possessive in a ten gallon tank making it difficult for a new or sick fish...and you'd also be exposing the QT fish resident to whatever the fish your isolating may have.
We, as a people, know so much more about outer space than we do about our own oceans. This lack of knowledge can very well spell the dangers that lay in wait for us.
The oceans surely would swallow us before a rock comes down to smite the planet of it's life.