Generally why other companies do not get the agency advice if the companies have a problems, what the reasons?

many companies fail in their efforts to improve quality without ever having asked for advice.Generally why other companies do not get the agency advice if the companies have a problems, what the reasons?
The cost of advice. Cost of quality. The majority of people go for the cheapest product, so companies running on low margins will not seek to improve quality. Many companies are reluctant to change direction when the tactics worked for them in the past. But I think the biggest problem is you have college graduates who think what they learnt in college is ';the be all and end all'; of business expertise and have no experience in ';thinking of creative solutions';.