gums are made of cells.
there's not really a good way to kill one without killing the other.
it's kind of like how cancer is made of cells, and killing cancer means killing other cells, too.
if i'm approaching fixing my teeth like chemotherapy, the idea is you eradicate the bacteria and lose a little gum, then pull back and hope you've wiped out the bacteria and can still regrow the gum.
if i'm pretty sure i've wiped out the bacteria, it's time to switch directions and focus on healing...