I mean everything has dependencies (some of the solutions elsewhere require Chrome and other common solutions require the JVM). At least Pandoc is GPL.
There are multiple ways to "depend", so if pandoc executes some external tool all of the work then might as well use that external tool directly. You will get more control over how the conversion happens, know for what search for when in trouble etc.
Sure, I don't mean that anyone would look at the Latex in between. I'm just saying that if tool x directly calls tool y to do the job then might as well use tool y directly.