Additional Ammo and increased reload speeds are meaningful perks. There are also PvE vs. PvP perks and just plain wanting to have a varied amount of armor for aesthetic purposes.
You can not simply say, "Destiny is not the type of game where you min/max, collect everything and try out different gear" when plenty of people do just that. The gear has stats, so you can min/max that. Plenty of people collect every weapon under the sun. The same can be done with armor (I have a huge collection of Hunter capes in my vault because I like the various looks).
Okay, well I don't think additional ammo/reload speed has a meaningful impact on the game. My success in any encounter has never hinged on me having those perks. I consider meaningful perks to be those perks that actually do something unique, e.g., outlaw, firefly, etc. I wouldn't spend hours farming gear simply to carry 4 additional sniper rounds, but I readily acknowledge that some do. There are other games (like Diablo 3) where min-maxing is much more important and, really, possible, given the wide variety of gear/stats/perks the game gives. That's why I say Destiny isn't really that type of game. Compared to other games, there's just not much variety and impact in the differences between gear.
Disagree.
Reload speed bonus for different types of guns alone is a good reason to have 4 sets of gloves for example.
Would you farm HM week after week, all those hours, simply for increased reload speed for shotguns, pulse, etc? You crazy