It is, in fact beneficial to many microbial life forms.
It is a strong anti-microbial to pathogens only.
When Yehova does something, he does it right.
Gen 3:18.
Thorns also and thistles shall it bring forth to thee; and thou shalt eat the herb of the field;
Oregano is that herb.
.
Wrong.
19 In the sweat of thy face shalt thou eat bread
How does oregano know the bad guys from the good guys?
Or are you just kidding?