Because, inauspicious-ness and auspicious-ness are siblings - they are conjoined Siamese twins.
For auspicious-ness to happen, one needs the inauspicious.
If there were no black, there would be no white.
In reality, there is nothing auspicious or inauspicious.
In reality, there is nothing auspicious or inauspicious.
To one who abides in totality, what is auspicious, is auspicious.
And what is inauspicious, also becomes auspicious.
And what is inauspicious, also becomes auspicious.