You have a different understanding of 'understanding' to me, then. I think it is possible both to be talented without understanding, and to understand without being talented. I think this is quite evident in many fields, where wonderful practitioners prove to be quite incapable of passing on their skills to others, and also where quite moderate practitioners turn out to be extremely good coaches.
Most famous photographers don't know details of the technology in photography, many doesn't even know all their gear capabilities and possibilities.
They have gathered their experience other means, they have a vision of the work that they want to do and they don't care about anything else.
There are many critically claimed photographers who has no idea about exposure or denoising etc. They just work with the cameras they have.
Some doesn't even know does their cameras have a pop-up flash, or how to get it open.
They don't know all the lenses there are, they just know they want wider or narrower view.
They work with basic rules of thumbs as what shutter speed for action or when flash is in use.
And they don't need to, when they get what they want and like, they are happy.