This is a self-limiting belief. The middle category exists, if you go looking for it. It's still a second job to find it though. You need to learn about the materials, construction techniques, and even manufacturing and white label trends of the industry in question.

It's exhausting. But after spending a month or two studying, you will be able to find pieces constructed to last a lifetime.

For sofas try the Insider's Guide to Furniture. Plenty of brands in the middle range using hardwood construction, made in the USA, with high density foam.