I understand what you are saying, and I agree, especially in specialized industries like yours. But part of the issue is scale - you are not expecting to sell 10 million drum kits a year. To industries in which supplying a high number of reasonably priced, quality goods is an important part of taking care of the customer properly, taking care of the "middleman" and the retailer is an important aspect of the business.
I guess my issue is with the blanket vilification of people selling products. The question "is the manufacturer working to satisfy you... or the distributors and dealers?" implies that the dealers and distributors are bad guys working against the consumer and the manufacturers are in collusion. Consumers wanting to buy reasonably priced soccer balls, shoes for the kids, toasters, bed sheets, etc want to be able to get a good selection cheaply and locally. That is best served by manufacturers working with distributors and retailers, who do their jobs efficiently, to get the right amount of product where it needs to be, when it needs to be there.
So, to me, a manufacturer taking care of of the distributor and dealer IS taking care of the customer, not colluding against them.
Likewise, there is a place in most industries for businesses like yours, who offer a very high quality product and personalized attention to the customer. That's fantastic! But that does not mean that it's the right choice for everyone. Many, many consumers' needs are best served by (read that as "What they want is...") an inexpensive, readily available product. That's why it's important for manufacturers of those goods to respect their distribution networks.
IMHO