Probably not going to cause any problems in this case.
Answers in comments are discouraged because comments are an improper place for an answer: they can't be edited indefinitely, downvoted, commented-on (except by thread-style reference--ugh), there's no revision history, &c.
So in the case that there's a good question and someone just wants to pop off a one-sentence "this isn't an answer, but... [answers question with almost no backup/explanation]," we want to be sure to quash that. Mostly because it discourages actual, good answers from coming in, and we don't get the quality Q&A that's …