Yes is true! Not every day is a good day to stock image.
On sunday i make a visit to a small lost village in the heart off Portugal, the oldest in the country with more that 600 years. You can see some pictures in this site here. At the beginning i was very happy with this trip, was a chance to take great pictures, maybe some of them can be stock pictures. But like i find out, some days are not pictures days.
In the end of the day and after i made 500Km i realized that is not the equipment that matters, but the person behind!
So true! When the mood isn't there, we aren't going to point our camera the direction it needs to be in, and we aren't going to spot those opportune moments.