"Why score low"
Mix of three possible, overlapping reasons rooted in demographics imo:
1) In the west most women reading lesbian shit treat every work of this kind as some sort of social statement and are insecure / guarded about how it reflects on their external and internal identity narratives. The overlap between female gl readership and lgb / ( often militant) 3rd wave feminist crowd is uncanny in english speaking parts of the internet (IF anonymous polls on different sites, things being posted on dynasty forum, and articles appearing on the more intelligent blogs reviewing yuri are anything to go by ; of the top of my head I can cite okazu and brainvsbook). I have no specific ideas on how to marry this point with popularity of "turning" fantasy for"l" and "g" sections of "lgb" crowd, but it might be a simple case of cognitive dissonance at play: someone might like the idea of "straying the straight" in theory well enough and derive please from it, but will hate the concept of"straightening gay person" more, so even if they did enjoy the comic, they're still gonna nuke it (it doesn't requireany effort after all). They're " virtue signalling for themselves" if you will.
2) For most guys and up to 2.0 (2.5?) kinsey females yuri is a fetish (regardless whether gl in question is serious or dumb - if you like the idea of two girls - not boys - interacting with each other on intimate, romantic and sexual levels, it is a fetish) so they may vote either way depending on how they feel in the moment : mondays queer ally (because low effort acceptance is west's mainstream currently) is tuesdays horny person.
3) This may be considered a derivative of 1): some people just aren't comfortable with entertaining the possibility of "sexual fluidity" existence (it seems to be an exclusively female disposition), and that "partner preference" may not only not be an inherent, but also permanent trait.
So there you have it, score explained, maybe.
(did not liked it, let you speculate as to why)