It's just my own personal opinion and I am in no way trying to start anything here. When someone limits themselves to what is named, popular, readily available, they are limiting the full scope of their collection. I have watched reefers stand in line at a LFS and each of them purchased a frag of something with a name in one tank because it was popular. Yet I continually go to the other tanks with no names in LFS, and this is where I have found some of the rarest, most stunning hidden treasures when it comes to palys and zoas. This is how I found and picked up a colony, not a frag, a colony of 30 of the biggest, bluest, most stunning palys I have ever seen. They had been sitting there for over a week, they didn't have a name so no one bothered to take a closer look or even inquire. I showed them to a visiting Physician and collector and he offered me an enormous amount of money for just one polyp. You will never believe what that amount was, but it was off the charts. Obviously I declined, nothing is worth that much.
If everyone collects the same thing, all you will have is a duplication of reefer A, B and C's tank. Reefing to me is an individual expression and not a duplication of that expression.
In short, and maybe it sounds like a contradiction, if you like it, buy it, but not because everyone else has it. That's what makes this hobby so enjoyable I think.
Mucho Reef