|Gratuitous photograph owing to lack of photographic activity this week...|
That is precisely what photography is - the more pictures you make the more good pictures you make. Not because you get better at making pictures but because there are more pictures. Martin Parr says pretty much that somewhere in the video below. Out of 600 pictures there might be 20 good ones that are more than documentary pictures. Which suggests to me that 1 in 30 is a good hit rate when you consider the 600 has already been filtered down from many more!