You might want to examine that remark.
I am as guilty as anyone else here in regards to being addicted to gear. I have a Leica M9 with 100's of lenses (true). I have a vast array of modern and vintage gear that I enjoy using. My wife calls me a hoarder, which is true.
What is the advantage? There is none.
Using a Summicron ASPH and the M9 is probably more difficult as opposed to using a Nikon D600 with AF. It is just because I like to use the Leica that I usually do.
But except for someone who is doing a microscopic examination of the files, there is no difference in the photos. (except maybe the D600 is better focused when taking photos of one's fast-moving kids)
The subjective quality of even an iPhone camera and a Leica M9 is really about the same for all intents and purposes when posting on the web, when viewing on a computer, even when making prints.
We LIKE to use the exotic stuff we have. There is probably more of an "advantage" in using a phone camera. It's always in your pocket, you can quickly use it, you can send the photo to others in an instant. (why were Leicas popular the 1930's? smaller. always with you. use it quickly as opposed to a bulky Kodak or tripod camera. complicated fine mechanical stuff to make you feel superior and part of the secret society of aficionados)
Just read the remarks of others. They look down on the clueless huddled masses with their big DSLRs and giant lenses. Because WE are part of a cult and they ain't.
We think the ghosts of Robert Capa, HCB and Weegee are whispering to US, and not to THEM. We use the holy gear, they use the garbage. (yes, you can rationalize that YOUR CAMERAS are smaller, lighter, nicer, sharper, require more skill. or maybe your camera uses film. ha ha.....SINGLE USE SENSOR...ANALOG.....SUPERIOR......not like the DIGITAL 'CANIKONS" of those unwashed fools)
What is the advantage, other than spending large sums of money on archaic or exotic equipment? About the same as an "audiophile" feels when he spends $4000 on some interconnect or power cable.
Guilty as charged.
Is the only advantage, to using the type of gear we prefer, to feel superior? Don't be an ass.