People commonly put “only” at the beginning of a clause when the word actually modifies a word within the clause. The rule is that adjectives (such as “only”) modify the word following. Putting that “only” too early can lead to nonsense.
This guy gets it right. Third panel. Think what he’d be saying if he had placed the “only” one word earlier, in front of “helps.” In this case still true, perhaps, but not his point.
By the way, in the next panel, that’s a rectangular prism, not a cube. But I digress.
PS—Here’s a typical incorrect “only.” Second word balloon. It should be “only last week.” (Ignore the “only” in the first word balloon. It shouldn’t even be there.)