Markets have determined that people prefer cheaper, shoddier sofas compared to expensive high quality sofas.
If you don't believe that, then go into business as a high quality sofa factory.
The furniture is built with poor materials, and dangerous chemicals treating finishes and frame construction. Almost all faux finishes (veneer, marble, concrete, leather, stone etc...) is made with really bad ingredients to give it the overall look and feel to the real texture they are trying to imitate.
The fashion brand furniture keeps evolving as a fashion brand should even when it comes to furniture. Therefore, furniture is a trend market, where people can afford it. Where people can not afford it, they fill their space with the knockoff furniture, realize it is not good quality, accumulate enough money to repeat the cycle with another poorly manufactured replacement. This is what is driving most of the demand today to keep churning out low price-point furniture for the newly emerging middle working class of today's world that do not understand what really goes on behind the scenes of how their furniture gets made, or maybe they don't care.
The other furniture market is for people who, as others commented, leave furniture pieces to their children. Those groups do not care about fashion, as with people that just need clothes to walk around not caring about the brand that they are advertising.
There is still good affordable furniture out there. Hand-built with care and precision as a Rolls-Royce car would be in the factory, mostly small companies in Italy and other parts of the world still to this day make great long-lasting pieces. The locality of the furniture manufacturer matters on the price significantly. Shipping logistics for furniture is a nightmare.
You can't, because your competitors have well-staffed marketing departments that can convince people their shit sofas are actually quality, sell them significantly cheaper than you could sell yours. They have more experience at this, much wider reach than you or any other upstart. It's hard to compete on quality when dishonesty is legal.