True artists and creators always aimed to form the best possible works they could achieve. Each of them were driven by the desire to make greater achievements and earn greater success.
How could they possibly gain the acknowledgement of their peers and be regarded as one of the leaders in their own field if they did not create impressive works?
Yet the criteria that determined whether a product was 'best' or 'perfect' never centered around the creator alone. Their profession never existed in isolation. A work of art or a feat of engineering were principally made to satisfy the needs of others.
The degree in which the product satisfied and met the needs of its user was the basis in which artists and creators justified their craft!
While there were plenty of creators out there who did not pay too much attention to the needs of their clients for various reasons, anyone who wanted to reach the top of their craft had to abide by a higher standard.