In this context the question is whether "sugary water" is better for removing heat. It's not pejorative to point out that at its core, milk is also sugary water

In this context the question is whether "sugary water" is better for removing heat. It's not pejorative to point out that at its core, milk is also sugary water. It's not a health statement. It's a comment about the supposed higher effectiveness of sugary water.