FWIW,
This product seems to be widely used and recommended in the field of visual arts conservation.
Apparently, it is thought that handling cotton paper, matte board, and backing that has been neutralized to ph 7.0 with hands at 5.5 is not as conservative as handling the 7.0 paper with hands that have been temporarily treated to have a similar 7.0 ph.
I don't think it's snake oil... I just think the application for various activities may or may not be as suitable or effective.
best regards,
mike