Oops, sorry, I haven't been paying attention!
Yes, the water does absorb the UV, and the glass helps as well. It is only a problem up close or out of water. Problem is that on night dives, with a really bright light, it is very easy to get point blank with many fish, especially octopus. My caution was intended for those situations. When beyond a couple of feet it probably is not an issue. Still, please be aware that these things put out a LOT of light, and even beyond a few feet you are blinding the poor critter, which may move him quickly to the bottom of the food chain. This includes other divers.
I don't know if they added a filter to the LC, but my Dive Rite has a very thick glass lens, and stil has various cautions throughout the manual. "Watch where you point that thing" was my favorite.
gerG