I was taking pictures of a fruit seller on the street this afternoon. Maybe because I was using a phone camera, something unpleasant was inevitable. The seller looked at me suspiciously. I tried to be friendly by smiling. He wouldn't let me take his picture and asked me to delete it. I felt guilty taking his picture without asking permission first. I hurriedly left after apologizing.
I don't experience anything like this when I catch something in nature. You don't need anyone's permission to capture butterflies, they don't even care if you take pictures with your phone. You can capture anything as much as you want—except for dangerous wild animals—even at close range.