I don't even think Togashi intended it to be so, but it ended up being just that. First of all, it has way more disabled characters than any other fictional work I have ever consumed in my life. So far, we've had 6 different disabled characters in the story. All of them had a major role and they all impacted the plot in their own ways. Only one of them was explicitly depicted as weak and in need of special treatment due to their handicap, and that was justified within the context. All of them were respected enough to be given as detailed and unique characterizations as anyone else in the series. All of them had distinct designs, gimmicks, and idiosyncrasies. They didn't always have to be shown in a positive light, either, as if disabled people are predisposed to be more righteous or innocent than the average person. Three of them were scumbags, and Shoot was initially a coward. Togashi rarely portrays his characters as just "one thing." He always gives them interesting flaws to make them more layered and believable human beings, and he didn't break that habit with his physically challenged characters.

Hunter X Hunter is often criticized for its lack of diversity, especially in its approach to female characters, and it is not a completely invalid criticism. However, I find it really interesting that its inclusive spirit manifests in other aspects of the narrative. I mean, this dude put six disabled people and one transgender child in a fucking shounen battle manga with magical fights and shit. What an absolute fucking legend. Nothing but respect and good wishes to the King.