So is the difference you see a lack of awareness?
Awareness, internal motivations (what drives you), but most of all, a failure of imagination. We address the crisis (the A), but often skirt around the root cause of the issue, which, IMHO, is simply that if you play with fire enough, you will get burned.
Let me be a little more concrete, I often see other BS's posting things like "I could never do that to someone else" or "I'd never do that" or even "I could never..". And, let me say, there's a good chance that some of them are right. There's also a near 100% chance that some of them are wrong and are just failing to see their "weakness" and protect against it.
If you'd asked me, the day after my wedding, "RIO would you cheat on your wife" (and we were having a real conversation, not just someone asking me to get the "right" answer), my next question would be "Please tell me the situation you have in mind and I'll answer the question". In some outlandish situations, it's pretty obvious (She's been lost at sea for 10 years but not declared dead and you have a beautiful girl asking you to sleep with her and have an NSA relationship in case your wife comes back), yeah, I'm pretty sure I'd do that. The more interesting ones to me though are the realistic ones, traveling for work, out at a restaurant and a really pretty girl smiles at you with an unspoken invitation to come sit next to her. This has happened to me several times since I've been married, so I know exactly what I'd do here; I don't sit down/acknowledge it or chat her up. That's a "flashing red" Danger Will Robinson for me, I know in that situation, I have a really good chance of doing something I've promised not to, and therefore, I remove myself from that situation entirely. What I think a lot of WS's do is lie to themselves, "I can handle that, shoot, I don't even like blondes" about their level of control in that situation. I know it can/would get out of control, because, IMHO, I'm honest (or more honest) with myself and I don't start from a frame of "I would never", I start from "I would, in the wrong situation, so let's avoid those situations".
People, in general, from my perspective, have a stunning lack of imagination or understanding of their capacity to do wrong. I study WWII a lot because I'm just so taken aback by the level of "wrong" committed by mostly "normal" people during that time. How on earth do you convince a normal person to turn on and start killing their neighbors?! Well, you can, and shockingly, it's not even that hard to do, you paint their neighbors as evil and the cause of their suffering and then just let the rock roll downhill. Sounds pretty much like the lead up to an A, right? Just paint your partner as "not meeting my needs" or "doesn't care about me" and then, suddenly, why care about them? That is at play in the vast majority of A's that we see and talk about here (which, incidentally, are different than most A's I know about IRL, those are much more deliberate and there's no "painting" the spouse negatively, it's just about getting more/gluttony).
The phrase I often use in my head is a "stunning lack of imagination" when I see people make "I would never" statements. The sad thing is, SOME of those people are right, they really would never, under any circumstances, do the negative/bad act, but, also, I don't think there's anyway to tell group A/B apart. Those who really wouldn't, compared to those who've convinced themselves they wouldn't. So I think it's much, much safer to move to group C, yes, I would, but only in certain circumstances, so let's avoid those circumstances.