Well actually, it is
I'm making some wild guesses here, but that Other category, accounting for 10% share of Yelp reviews, is likely to contain eating establishments of some sort.
A separate Beauty&Fitness category exists. That is probably how the manicure, hair salons, gyms, and other non-food related ratings in that sector are classified. That leaves room for nutritional supplements, health food stores, and food-oriented entries in Health. I think ratings of health-food related establishments are more likely than for physicians, hospitals and insurers. Remember, this is Yelp. Expect to find reviews of say, a dialysis center or hospice or skilled nursing service on Yelp? No, I think not!
There should be plenty of reviews of bars though. I'm not sure where they appear. Maybe in Restaurants? Or Entertainment? Probably not under Health!
The 23% Restaurant share is high, but even higher than it appears in this chart. Meanwhile, other categories are too scarcely populated or fragmented to provide enough coverage to be useful, with the exception of very large contiguous metro-urban areas.