When a reviews or lists of best zoos or museums come out, most don't really factor that stuff in, at least not much. Most people who are visiting don't either.
My point is that for museums, schools, botanical gardens, the "best of" lists often DO factor "that stuff" in. But because zoos are generally not regarded as serious by most of the public and press, "top ten" lists etc. tend to be focused only on the fun side of things. Which continues the spiral where zoos--despite the deadly serious issues they are trying to address--get relegated to being thought of as just a leisure time consideration (or de-funded by governments and donors as "unessential").