Bandwagon fallacy.
Your trope suggests that gay couples with kids pose no problems for kids in certain locations. You leave your reader to infer much....and to get things wrong.
1. Persons desiring the State to countenance homosexual "marriage" (since the phrase is an oxymoron) propose a radical redefinition of marriage. Onus theirs to prove benefits. Likewise onus theirs to accept "no" for an answer -- which gays have refused to do, thereby displaying bad faith and bad citizenship.
2. No positive benefits have been adduced by anyone, except claims unsupported by study data, that children will thrive in households led by homosexual couples. By "thrive" I mean meeting all the indicia of a healthy childhood.
3. It will not do simply to suggest that in this or that gay Nirvana, homosexual couples raise children proficiently because of ......"regional differences". Which is an under-the-radar way of introducing a favorite gay canard, that gay would be okay if only you people were restrained by moral teachments and law (arising from what authority?) from practicing your homophobia [smear-word alert]. This is the lie codified by the gay cabal who successfully overthrew the American Psychiatric Association and redefined homosexuality as "normal", based on the discredited Hooker study, rather than as the paraphilia which it had been correctly labeled, and which it nevertheless is in fact whether or not a compromised psychiatric profession recognizes it or not.