Why do so many imported furniture pieces wear out quickly?

Because they're made for 3 things: to look good and to sell. They're not made to last, they're made to look good, they're made to sell.

And all of a sudden, that cheap Chinese foam breaks down, not to mention you're breathing in all types of harmful chemicals.

Buy American products, support American jobs, get furniture that lasts a long, long time. Something that you can have pride of ownership in.