Because we have unreasonable expectations. Making things work well is hard, and thus expensive.
Take a chair, for example. Anyone can make a chair: just get a bucket, turn it over, and sit on it. Boom; backless chair. Want a backrest, arms? Get a 2x4, a saw, a drill, and some bolts. An hour later: Boom; chair.
You want a chair that works well? How do you even define works well for a chair? Do you need cushioning? Do you need to swivel? Do you need ergonomics? Do you need to sit in it for 15 hours? Do you need it to cost less than $1,000?
Take a chair, for example. Anyone can make a chair: just get a bucket, turn it over, and sit on it. Boom; backless chair. Want a backrest, arms? Get a 2x4, a saw, a drill, and some bolts. An hour later: Boom; chair.
You want a chair that works well? How do you even define works well for a chair? Do you need cushioning? Do you need to swivel? Do you need ergonomics? Do you need to sit in it for 15 hours? Do you need it to cost less than $1,000?