I'm with you: Can't hurt. For the life of me I can't imagine why it says not designed for towing yet has the hole in it - unless the hole is in the template and for your model they used a weak gauge of steel.
I'd think that even if that's the case, as long as it's bolted directly to the frame then you should be ok towing a small utility trailer.
Of course the downside is that the only to find out I'm wrong would be to lose a trailer out on the road

...so I'd call a local dealer on it just to be sure.