You may be right. But I'd change one word in your theory, and then I would agree with it, based on not just Mexicans, but every culture where family and neighbor mean something much more expansive than NOB.Being a person who studies philosophy, psychology and history etc. has me not trying to totally understand everything from an emotional level but from a subjective view of differences most people have than might seem non objective to me. Mexican culture has one big difference. Most raised NOB Americanos have a main value of pride in being independent . Most born SOB have a main value of being codependent. After overcoming my distaste of this aspect of the culture I have come to realize you can put the dots together when things happen that I before thought were wrong, but now see why they are so prevalent. Not thinking I was better because of a value I had or a value others have made it all make sense and now I see things that I just simply say to myself: "Who cares." This works for me.
Change "codependent" with its connotations of addiction and the people who enable those addictions to "interdependent".
Interdependent seems to hit the mark for me: relying on each other for both survival and for well being. I used to be married to an alcoholic. I've seen codependent in all its tawdry maladaptation, in too many variations to apply it to an entire society.