You have put your finger on a problem with these challenges. A leading line is not an end in itself but a means of getting the viewer to get quickly to the main point of the shot. There are many ways to do that and, with or without a lead line, you have done it here.
good point - Ive seen lots of leading lines as I walk about but keep asking myself - leading to what? There is no point if there is nothing when you get there! I like the idea of the implied leading line. Thanks for these fun shots and something to think about.