Defensive operations on an active fire ground are standard operating procedures; no argument.
But most departments do not operate the way this department in Tennessee does where they did not run the call when it was received because the caller was not on their participant list.
They would have likely encountered a brush fire or, at most, a room and contents fire from the structures closest exposure based on the story and they would not have let it just freely burn.
Where I live firefighters certain actions will require a fee (obviously not paid to the firefighters), like pumping out a cellar or felling a tree on private land which is not threatening any property, but actually not fighting a fire when it would be easily possible would be unthinkable.
This means that often saving lives and saving property can not be done simultaneously. Some time ago here there was a report about house ownwers getting upset at firefighters for just standing around "doing nothing", while their property burned, which happened exactly for the reason outlined above.
The linked article aside, letting buildings burn down is in fact standard procedure for fire fighters. A sufficiently dense fire is extremely hard to stop as long as it can fuel itself and a controlled burn down is often the only reasonable way to end a fire. It's not like anything would be recoverable in any case.