A sweater will still fit! So will plenty of dresses and jackets — just look at how they are designed today. All that knit, stretchiness, and so forth. You could gain 20 pounds and maybe more and still wear these things.
The problem with the kind of shoes these shoe-freak ladies are buying is that they are never comfortable, so it's less that they'll continue to fit than that they never fit. There's always a fantasy that these new shoes you're trying on really do fit, because they feel okay in the store. Later — like a boyfriend who seemed so good at first — they'll hurt you. And so you constantly need replacements. This looks cute.
Well, to keep this analogy going, maybe shoes are like the bad boy who gets you hot and then disappoints you. Shopping for sewn fabric to cover your torso requires you, right there in the store, to deal with the practical needs of your particular body. So boring! That dress is the dull, nice guy who might work out longterm, but you can't get excited. What makes that dress (or husband-material) untempting is you — your body, your real needs.
ADDED: Manolo the Shoeblogger has some ideas about what makes shoes special. First: they "have magic in them."
Our fairy tales are filled with stories of fantasy shoes: glass slippers, hundred league boots, ruby slippers, shoes in which old women reside, boots for sword fighting cats, shoes made by elvish cobbles at night, red ballet shoes which cause the wearer to dance incessantly, and on, and on.Don't forget "The Girl Who Trod on a Loaf."
So Inge put on her best clothes, and her new shoes, drew her dress up around her, and set out, stepping very carefully, that she might be clean and neat about the feet, and there was nothing wrong in doing so. But when she came to the place where the footpath led across the moor, she found small pools of water, and a great deal of mud, so she threw the loaf into the mud, and trod upon it, that she might pass without wetting her feet. But as she stood with one foot on the loaf and the other lifted up to step forward, the loaf began to sink under her, lower and lower, till she disappeared altogether, and only a few bubbles on the surface of the muddy pool remained to show where she had sunk.Read the whole thing.
But where did Inge go? She sank into the ground, and went down to the Marsh Woman, who is always brewing there....