... (no matter how well intentioned or well worded or well designed or carefully constructed) is that it is an isolated entity, an artefact that a student will encounter only once in their life. It is not recursive, it is focused only on the now, and the what (topic). It is a small piece of time, a sliver of knowledge, captured at one point. It is not something a student will carry with them beyond their schooling days.
A Visible Thinking strategy on the other hand, is more.
It is a tool for thinking.
It is a structure for focusing our thoughts and being aware of them.
It is a behavior that our students will use.