I didn’t make it up — just something I saw on a greeting card once. But I agree.
“Mighty good” doesn’t mean great, excellent, or perfect. Mighty good is the best you can hope for; anything less is worse than spinsterhood and childlessness. Anything better is gravy.
Yeah... I’ll just take any ol’ husband, no matter how mean and nasty he is, as long as he can impregnate me, and so I don’t have to live alone. That’s some great plan. No husband definitely would be better, IMO. Others, I’m sure, feel differently, and that’s an option for them. Free will.
And I decided in the ‘70s that I didn’t want kids, so a “childlessness” argument doesn’t touch me.
You are making an "Appeal to Extremes" ("...any ol’ husband, no matter how mean and nasty he is, as long as he can impregnate me..."); it was certainly never suggested that women should marry "mean and nasty" men.
You are also "Moving the Goal Posts" ("...“Mighty good” doesn’t mean great, excellent, or perfect. Mighty good is the best you can hope for...").
Any reasonable FReeper would agree that, generally speaking, "mighty good" means "above average." Perhaps in some vernaculars (like in the South, where hyperbolic courtesy is popular), it might mean "adequate."
To be satisfied only with "the best you can hope for" is a recipe for failure in life.
Regards,