
“It” is an object pronoun, while “they” is more of a person pronoun. Some people can see the pronoun “it” as being demeaning if it’s used towards them because it’s an object pronoun. I’m personally okay with it because of my gender identity. “They” is generally used to identify something we see as on-our-level or personified, per se, in a gender-neutral manner. I hope that makes sense ^^