Consumers are as self-interested and profit-driven as businesses. Just that profits for them come from unquantifiable, intangible returns in the form of satisfaction derived from the products they buy.
This is something mainstream economics and discussion about markets miss. (Only Austrian economics acknowledges this). Markets are not driven by profits. They are driven by producers satisfying demands from consumers.
Speaking of Austrian economics, here's an Austrian view of the subject we are discussing, in case you missed my other reply in which I shared this link:
Also, my business model need not and will not be the only one that will be tried out. Competing businesses will implement their models and the customers will have the option to choose between them.
Eg: If consultants and evaluators turn into advertisers, there is opportunity and profit for others to take their place to deliver genuine services, because there will always be customers for buying genuine services.
The improvement over the current status quo is this: patients, unhealthy and sick people have a way out of the corruption in the form of competition. And there are real incentives for people to offer a way out.
(Note that I'm not suggesting perfection at all, because perfection can never exist in human societies.)
And yes, if people are healthy, then they won't need many doctors, dieticians or consultants.
But you could say that for any problem that people have in life.
Every person will want his problems to be permanently solved rather than partially solved.
And those who permanently solve them will exist, unless a government-enforced cartel or monopoly prevents them from existing.
I have looked into and explored alternative medicinal and nutritionmus practices. They do exist. And one has to work hard to find them.
But they stay away from public view because of goons and criminals from the state potentially coming after them with their nonsensical regulations.
In a free market, these people would be far more prominent.
My ultimate point is this:
Trusting the government to regulate food and medicine will not work. It will always be an organisation of crookery and thievery. It's in its nature.