Why don't the gardener's take the spring off?

I can't believe the total disregard for avian life when it comes to gardeners.  They don't recognize a bird's nest, and even attempt to lessen their impact on them.  Who teaches these gardeners these crude tactics, and don't they feel bad doing it?

There was a sparrow's nest in the hedge this morning, and as I type this, the noise from the electric trimmer, and blower are making me angry.  I won't know if the nest still has babies in it, until they are all done.  Hopefully the nest is deep enough inside the hedge. :(

I had asked the landlord to wait until the babies had gone, and he looked me straight in the eye and said "no."

So sad, and hard to believe that waiting a few weeks for the hatchlings to get up and out was unreasonable.  So goes the way of the world.