Always "easy" to find???? I am not so sure that applies. Easy to find for who??? That is the issue, as I see it. Of course it's easy to find for you, but you are not the one in trouble. What should be easy to find is not there. New diver that was trained to look for the yellow hose on your right swims up to you and don't find an octo...because it's not there. You very well may have the one thing almost as bad as a great white within two feet of you, a panicked diver looking for air he cannot find. You can imagine the rest. There is a 50/50 {or worse} chance that this is not going to have a happy ending.
Same new diver swims up looking for the yellow hose and finds one....he easily grabs it and gets what he needs, maybe even barely disturbing you if you are occupied with something else like your camera. Some other diver running low or out of air is bad enough, is it worth complicating for the personal reduction of one hose???
I am a relatively new diver and I always take the time before a dive to familiarize with other divers and what gear they have. I am surprised to learn the number of divers that have never seen or heard of a safe second.