You are allowed to voice your opinion. Whether or not that opinion is valid, however, is a completely different story. Luxury and quality of life services shouldn't be free.
The reason is that it's a luxury. Plus, people who need enough space to store every outfit in the game are most likely willing to shell out a few bucks every month to store them in the wardrobe, as well as enjoy a few more benefits.
You'd need to buy close to every available outfit for that to happen. And for that you'd need to spend more than a hundred dollars on the game. The average person will most likely use one or two outfits for the entire game, plus the PvP uniforms.