Something of value isn’t necessarily commercially viable, and vice versa.
If you follow a strict and specific diet that you find helpful, but nobody else does, commercial viability will be tough. To build a business around that diet, your assets could potentially include books, restaurants, food boxes, and so on. However, without the commercial viability, getting to the point where the assets become exploitable is zero to none.
Inversely, if you come up with a diet that everybody loves but is detrimental to the body, you may have nailed commercial viability, but the value you created is doubtful and arguably unethical.
Successful businesses make the creation of added, genuine value commercially viable.