Fortune favors the prepared.
How to get lucky on the street?
Walk around on repeat and consistently make photographs every single day. The more that you make photos, the more lucky you will be. Honestly, I don’t even consider it luck most of the time. As much as serendipity takes over, daily practice enhances my pattern recognition. On the rare occasion when the stars align, I position myself, and press the shutter.
Skill creates luck.