Customers will buy the products only if they are able to deploy them and exploit their potential to create resources. Deployment requires ready availability of skilled professionals. One complements the other. In other words, sales and support go hand in hand. First the vendors create the product to match the requirements of the customers, and then create professionals to run and support the systems.
Vendors view training and certification as key elements in the overall strategy to build businesses.
The IT revolution has fuelled unprecedented growth in demand for skilled IT professionals. There would be virtual chaos at the customers places as there would be many people talking about the different aspects of the software, even while no single individual had complete knowledge of it. Again, it would be tough for the company to sell the product since there would be no skilled professionals to work on it. IT companies need skilled professionals to work on mission critical tasks, as for e.g., in banks where hundreds of transactions are taking place every second. In such situations the employers will just not trust any critical tasks to an unskilled professional.