I mean, the source article specifically points out a second time that it's not a 100% chance for omnivores (and I'm hoping no one would believe so anyways), so I doubt it was intended to be manipulative.

And I do think this is a worthwhile graph. You're half as likely to develop diabetes, that's the relevant info here.
Assuming people don't get mislead to think 100% of omnivores get diabetes, I don't think the majority of people would be any wiser by knowing it's specifically 7.6%. These percentages are hard to conceptualize, especially since various factors are at play.