In my opinion i think it matters just as much as with dogs. That's why there is the American kennel club to show lineage. There are people who want that proof as much as there are people who want a pure breed dog. But some people don't care, like me, if it looks good I'll take it. However if i want something that you can only find as a named coral I'll take it if i want it bad enough.
Tank thread: https://www.reef2reef.com/forums/showthread.php?t=81000
LG P999 EaglesBlood 2.8, Trinity ELPmax
Tank thread: https://www.reef2reef.com/forums/showthread.php?t=81000
LG P999 EaglesBlood 2.8, Trinity ELPmax