Why are bike shops so expensive ?

Why are bike shops so expensive ? 

1. Bikes are good Quality and include warranties 
2. Bikes shops have great cycling knowledge 
3. Bike shop floor high performance price bikes 
4. Bike owners and mechanics need to make a living wage. 
5. Bike shops are usually small business and pay lots of taxes to your community 
6. Bike shops provide lots of other free services 
7. Small business have little buying power