Sorry maybe I'm dense, but what does the lady of the lake have to do with this image aside from a body of water being present?

I believe the meme format typically involves asking the tank questions as if it were a great sage with wisdom to impart.

So it has to so with the lady of the lake because not only is there a body of water but in both cases there is a role for paying deference to the entity in the water (Lady or tank).