Don't know how many firearm owners you know, but that really isn't a thing so far as I know. Everyone I do know that owns multiple firearms acquire them with the intent to use them - range, hunting, etc. The exceptions are where someone acquires something of historic interest (belonged to someone famous or infamous, for example) and those are typically for historic preservation and as investments. They'll usually be functional, but also usually won't be taken out to fire due to their historic nature and value.
Never did "pull the trigger" on a Garand, but wouldn't mind having one. It's an interesting weapon historically, and, personally, the uncle I was named after used one in WW2 Europe. He never came back.