It is just a caution, but wise folks watch. I wrote it. The penalty for exceeding 14.7 degrees is that you touch the tail fairing, scrape the paint and buy your crew chief a case of beer. At nose into 15 knots of wind at light weight, full aft CG you hover at 10 degrees nose up, or so.
The fairing is good for a 3000 lb whack, so you would have to work to make it do more than just crush a bit. If you really bashed to fairing, there is slight possibility you can disrupt the TR cables, but that would have to be one awful strike.