In any case, the point remains. Even if we set aside famous dandies (e.g. Count d'Orsay, Evander Berry Wall, Beau Nash, etc) and Old Hollywood icons (e.g. Gary Cooper, Fred Astaire, etc), the fact remains that most people we know who are well dressed love clothes. That includes people on this forum and others, and in the general population. They all have a lot and acquire a lot.
Take our own corner of the internet. For anyone who we can think of who was well dressed in 2007-2010 (most of whom no longer post here), they all had fairly big wardrobes. It's really only you who has been able to do well with a small, highly curated collection. Most people enjoy clothes, buy things for fun, and take pleasure in putting together different looks. Stitchy is right. Many of these people would feel bored if they kept to something as small as what you have, so they experiment with a few things here and there. Slightly different shades, textures, cloth, colors, details, etc.
We should distinguish the precise problem on this board: most people have bad taste. They will continue to have bad taste whether they have large or small wardrobes. The people with good taste will continue to be well dressed whether they have large or small wardrobes. The size of the wardrobe is not the problem. It's the person in the morning choosing what things to wear.
Whether you think you would look good in Foo's wardrobe or not is a separate issue. Comparing him to what goes on in WAYWT, however, is pretty absurd.