It wasn't a crazy play call. It was risky, but in line with how Pete Carroll coaches.
Pat Riley once said "If you stick with your principles in making a play call, even if it doesn't work out, you are not making a mistake, you are making a decision"
This was Carroll's decision, and it was not odd for him. Would most coaches do it? Probably not. he takes risks.
Seeing the personnel match-up, they were not going to run it, unless they called a TO first to get in their goal line O. But they only had one TO. So the next best thing was to throw what they thought was a low-risk/low-reward pass. All three WRs should be single-covered, as only 3 DBs were even on the field for the Pats. They could win it with that play, but most likely they'd just stop the clock, "wasting a play" as he called it, which means saving a TO.
Wilson just failed to deliver a low risk pass. I would think he was told to throw it away if not 100% sure.
The safer option would be to call TO, run it, and (if stopped) run or pass again if you have the time. That has risks too, though, in getting the second play off with a running clock.