I think it does. When you consider the meaning of ambiguous (“open to or having several possible meanings or interpretations; equivocal”), I think you can argue that similes—and metaphors, perhaps even more than similes—can be used in such a way as to introduce ambiguity and use it to some literary purpose. That might not be the most usual use of simile, but I would certainly say it is a possibility.
To say that it makes sense is not necessarily to say that it is correct (or that I agree with it) but only that it is a sensical statement that can be logically defended. I presume that your essay then goes on to do just that, using an example that supports your case.
By the way, you don’t need both “sometimes” and “often” as qualifiers. That’s redundant. “Often” is an adverb of time, and you are not really talking about temporal frequency here but of commonness. “Sometimes” takes care of that and is perhaps a better choice because this use is not actually so common, as you rightly point out with “unusual.” Better delete “often.”