I am very new at this, and therefore speak perhaps where I should not, but I cannot help but contrast my last two dives in the light of the opening quotation.
A week ago, I dove with NW Grateful Diver. We dove shoulder-to-shoulder (as best I could maintain it) and could see each other, and one another's lights. As a result, there was no anxiety about the location of my buddy or my "responsibility" for him, and we had the leisure to look about us and see a great deal of sea life. It was certainly the best Puget Sound dive I have had thus far.
Yesterday, I dove with a novice diver, although under the supervision of Bob and Uncle Pug. Totally different experience. My buddy did not stay in my peripheral vision, but repeatedly turned away, so I had to look for him. At the same time, I was trying to keep the dive leader in sight as well. I could NOT stay in continuous contact with my buddy, because if I turned to look at the leader, when I turned back, my buddy wasn't there. He wasn't far, he just often was where I had to turn my head or change my position to see what he was doing.
The dive was stressful and anxious, and I didn't have the processing power to do any "sightseeing".
I'll take the rigorous attitude toward buddy diving any day. It's more relaxed, more reassuring, and at least for me, much more fun.