Is that the best you can come up with to defend your "statistics" claim, @dreamingofsun?
Because you are comparing apples with oranges.
Children do better in HAPPY marriages. What child wouldn't want both their happy parents around to nurture them?
Children of UNHAPPY marriages do significantly worse, & the article you have selected talks about the outcomes for children when conflict exists within the marital home:
"Children whose parents often argue score worse on measures of academic achievement, behavior problems, psychological well-being, and adult relationship quality;"
"Another line of research has devoted attention to variation within continuously married two-parent families, particularly with respect to marital conflict. Children whose parents often argue fare worse than those whose parents get along: parental conflict is associated with negative schooling outcomes (Hanson, 1999), behavior problems (Morrison & Coiro, 1999), early and nonmarital family formation (Furstenberg & Teitler, 1994; Musick & Bumpass, 1999), lower quality adult relationships (Amato & Booth, 2001; Booth & Edwards, 1990), and lower psychological well-being (Amato & Sobolewski, 2001; Jekielek, 1998)."
"Testing the moderating effect of conflict on divorce (i.e., the interaction between conflict and divorce), many find weaker negative associations between divorce and child outcomes in the case of high conflict marriages, suggesting that divorce may bring relief from the stress of high conflict family environments (Amato & Booth, 1997; Amato, Spencer Loomis, & Booth, 1995; Booth & Amato, 2001; Hans"