If a business is easily copyable and no-one will finance it for that reason, that business may never come to exist, which is clearly a net loss to society. Of course, this does not apply to yoga videos, but a lot of startups that venture into unproven technologies or markets are very risky investments.
Having new businesses is not a net loss to society? Sure, a vast majority of them will be worthless, but without experimentation how else will valuable new markets be discovered?
