Marketing is not evil. Companies exist to sell products and services to consumers. Consumers have to know about the products or services before they can buy them. Consumers actually need the products and services, and marketing is how they find out about them. Are there some unethical marketing techniques? Yes, of course. Marketing can be annoying too, but that should not be the goal of marketers. Customers who are annoyed are not going to buy anything. Marketing can be helpful and even entertaining.
I also believe that the initial assumption that marketing is evil is faulty. Marketing is all of the activities related to bring product to the market. There is nothing evil about that. There might be deceptive and illegal practices in doing that but that is such a small percent of the overall marketing segment of business.
This question make an assumption that is quite incorrect. Primarily and inherently there is nothing evil in marketing. It is a different matter that methods of marketing may be used for achieve unethical and in appropriate ends. We can use any form of energy, including nuclear energy, for useful purposes as well as for destructive purposes. This does not make energy as such evil. Energy is not only useful, it is also essential for very existence of life.
The concept of marketing is actually a very useful, and I may add noble, concept. The central idea promoted by marketing is that to do well in business a company must always focus on satisfying needs of the customer.
Prior to development of concept of marketing developed, the business approach of most of the companies was to first make a product, and then try to sell as much of it as possible. If the product was good and the customer found it useful, that was good for business. But, the traditional sales approach, which preceded the current marketing approach, did not concern itself much about finding out what the customers need and develop products to meet those needs. They just concentrated on selling whatever they could produce.
This type of selling approach is wasteful for most manufacturers and the customers. The manufactures do not make as much profit as they could, and customer end up receiving less benefit for the same amount of money and eforts spent by them.
In contrast, marketing benefits both manufacturers and consumers. Manufactures are able to create and deliver products meeting customer need more efficiently. Every dollar spent by the manufactures has capacity to create higher benefits to the customer. The customer derives greater satisfaction per dollar even with reasonably higher prices of products. Thus they get more value for money. Manufacturers also reap more profits by higher profit margins and increased sales.