You're making stuff up.
Here's a 650 lb, $43,000 sectional made in San Diego by a company that's been around over 35 years. 1 piece, zero assembly required.
I don't doubt there's plenty of crappy sofas on Wayfair, but the rest of your post is completely nonsense.
https://www.wayfair.ca/furniture/pdp...-elgy1431.html