Arturo Di Monica does not own or in any way control the space where the Fearless Girl is situated.
He does not own the land, he does not own the sight lines. The only thing he owns in the Charging Bull and he has loaned that to the city.
He could turn it around and put a pile of bronze poop behind it.
If the city does not remove the silly girl statue he should take the bull back and sell it. I am sure there would be one hell of a bidding war for it on Wall Street.