Not sure that shrine in particular but I do think torii gates in some shrines are replaced somewhat often. At Inari they had business names behind them which I assume are the ‘sponsors’ of that torii, probably they pay to have the gate fixed and I imagine that brings luck to that business. In short, he might have been lucky to deface the least critical part of the shrine.
oh, Im just guessing here though (from what I saw when visiting), hopefully that is the case