They may be a small part of the economy as measured in imaginary numbers being shifted around but still have a significant negative effect on our lives that cannot be easily escaped. This is even more true when you also count publicly traded companies which have similar incentives to sell out their "customers" in order to benefit the real customers and are often just the final form of VC funded startups.

Most companies are wasteful. Perhaps not as wasteful as a startup, but still incredibly wasteful, and it scales non-linearly with size.