The same argument could be made about the towers themselves, that they were testimonies to human folly. At the end of the documentary, the question of why build the massive twin structures at all seems as inexplicable and unanswerable a query as why climb them -- the answer to both questions may be as simple as 'because it could be done.' There are other, unspoken resonances with 9/11 -- because climbing the towers was illegal, Petit had to act as if he was planning a 'caper,' a drive that gives the film its plot structure but also recalls the 'caper' to cause the tower's...

However, as uncomfortable as the film may make the viewer at times, particularly if he or she has a particular emotional connection to the events of that day, Petit, for all of his foolish bravado, meant his ultimately successful fear to be a tribute to the city and the towers. The Frenchman, with none of the animosity that came to characterize U.S.-French relations in the aftermath of 9/11 clearly loved the city of New York and loved the structure his feat was meant to celebrate.
Works Cited

"Man on a Wire." Directed by James Marsh. 2008.