I have some questions

Almost two years ago, I saw an unfinished LEGO set (presumably set 10295) next to an escalator at Banqiao Station in New Taipei City (Taiwan), but I didn’t see the person who built it. I waited a few minutes, but no one came by to finish it, so I left. Recently, while organizing my photos, I came across some pictures I took back then, and it got me thinking about a few things: Why build LEGO in a public place? Have any of you ever built LEGO in a public place? (Besides at home, I’ve only...