Really, that's not a bad question - a perspective can be harmful or not, but "wrong" is a little more difficult. If a perspective is, by definition, subjective... can right or wrong truly enter into it?

He frowns a little, and he would probably comment on that in one way or another, but then there's that question, and Giorno frowns even more.

What a complicated question. Much more complicated than Hisoka could ever guess. But, he can probably answer it with... "I did. For personal reasons. It's a little more difficult now." A little pause. "I haven't spoken to him in months."