Suits tend to be uncomfortable (mainly, they're too hot to wear in the summer, don't fit well if your body size fluctuates), are fragile and easily get damaged or stained or rumpled (eg, you can't casually sit on the grass wearing one) and are expensive and annoying to clean (you can't just toss them in a washer/dryer).
So there's a bimodal equilibrium. If you don't own anything that's dry-clean-only or requires pressing, it is a real pain in the ass to deal with one or two items that are. Whereas I suppose if nearly everything you wear is dry-clean-only, you evolve a very different set of habits such that it doesn't seem like a big deal to take care of a suit.
If you only wear a suit once or twice a year, it's not worth getting it re-tailored to fit you well or getting one perfectly matched for the seasonal weather...so when you DO wear it, you're wearing something that doesn't fit well and is too cold or too hot, which makes you less inclined to wear one often.
So there's a bimodal equilibrium. If you don't own anything that's dry-clean-only or requires pressing, it is a real pain in the ass to deal with one or two items that are. Whereas I suppose if nearly everything you wear is dry-clean-only, you evolve a very different set of habits such that it doesn't seem like a big deal to take care of a suit.
If you only wear a suit once or twice a year, it's not worth getting it re-tailored to fit you well or getting one perfectly matched for the seasonal weather...so when you DO wear it, you're wearing something that doesn't fit well and is too cold or too hot, which makes you less inclined to wear one often.