>>16777166 (OP)
Saturated fat.
>but we need saturated fat!
Yes, in moderation. The average western diet has too much saturated fat in it. Which is what the C score stands for. Almond milk doesn't really contain anything that is as easy to overconsume the point of negative health outcomes, which is why it has a higher score.
Thinking in terms of
>x has something we need, therefore it's healthy!
Is literally kindergarden tier thinking. Most foods shouldn't even be thought of in terms of healthy or unhealthy by themselves. Diets can be healthy or unhealthy, depending on whether they meet all the daily requirements without going over them. Some foods can make it easier or harder, but as long as they don't contain harmful doses of things we don't need period like trans fats, they can be a part of a healthy diet.