You're completely right that excess added sugar (including added fructose) is well-known to be unhealthy, and that switching to non-meat foods wouldn't address

You're completely right that excess added sugar (including added fructose) is well-known to be unhealthy, and that switching to non-meat foods wouldn't address this issue. But, low-meat diets aren't necessarily higher in added sugar than higher-meat diets. (I did say "healthy" non-meat foods to exclude, for instance, replacing meat with candy.) I agree that reducing added sugar consumption should be one of the highest priorities for the average individual who is looking to improve their diet. However, this particular question asked about the racial effects of reducing meat consumption, so the benefits of reducing added sugar consumption wouldn't be the most relevant piece of information to answer with.