Poor trees!

Photo: Lenin Gani
In the name of beautification for the SAARC Summit all over the city, it seems those poor trees have been sacrificed with the majority being wrapped in barbed-wire fencing. It is downright shameful and insensitive of the persons carrying out the work.
While a tree takes years to reach full height, but within a matter of days it is as good as dead after steel nails have been driven into its heart.
Can somebody explain why this is happening?