Actually, I have seen perfectly valid reasons for having both the extracted subfields and the whole address as originally input.
The crux of it is that addresses are notoriously dirty, mangy and amorphous pieces of text, that can virtually never be parsed by a computer with 100% accuracy. Consequently, some apps and business that I know of attempt to parse out the address into more codified subfields (like street number, etc.), but these are never truly complete. Therefore, it is important to keep the original address text, potentially for prodcing the label, but also for human inspection to determine of the subfiled extraction was correct and because if improved algorithims are brought in later, you may want it to repars some of the older, mangier addressses.
And finally, there may be legal issues and reasons why the exact original text must be preserved.