Who views it as an "Answer"? An answer to what?
I just view it as a categorization system of thought processes based on intangible qualities percieved in people. Obviously, there is no literal "Ti" process in the brain. Obviously, there is no foolproof way of determining a person's type, including your own.
I consider it to be like categorizing other human traits. Even visible ones aren't always agreed upon. For example, there are 5 basic hair color categories: red, brown, blond & black. We all know there are more than 5 hair colors in the world. There are infinite colors. However, most of us can identify a category that fits our hair color best, and determine one for others. Having very distinct categories makes it easier to choose one, instead of being stuck between two similar categories with only small, nuanced differences. Occasionally, you will look at someone & see dark blond hair, but someone else sees light brown hair, and so now the best category for their hair color is very much a matter of individual perspective. I see personality typology in a similar vein. The best type match can be a matter of perspective, and some people don't fit as neatly into one category as others. That doesn't mean the whole system is entirely useless, it's just limited in what it can describe.