The main reason, because he is a two month rental. It isn’t like we get all of spring training and a few months of the season to ‘work on things’.
You are essentially hoping to catch lightning in a bottle, which historically, this fan base almost always hates and complains about at the deadline.
If the cost that of a backend starter, sure. If I have to pay a premium for a former act, no thanks. I wouldn’t get into a bidding war for him.