Probably true, but she only made that decision because she was convinced the chances are so miniscule. She did not see it as placing their lives or anyone else at risk. And if Mike did what he said...
You 100% know that if she didn't think it would have stopped their Hamlin scam in its track, she would have immediately told Jimmy. No sane person would be like 'Oh, yeah, this cartel member who wants us dead after a botched assassination is alive, but the henchman just told me he'd probably go after so many other people instead of us, let's just not even mention it to my husband who is just as involved as I am and go on our regular lives without lifting a single finger to, I don't know, install a fucking chain on the door maybe'?
She wanted the Hamlin thrill, and she got the Hamlin kill.
I also think that ultimately, that's why she feels so much guilt for the death of Hamlin while Jimmy is able to move on so easily.
He had no idea, and
he could't have done anything different to avoid it. If he had known, Jimmy would 100% have changed his approach, he was terrified of Lalo, shit he probably would have packed his bags and left town or some shit. As much as he wanted to fuck with Hamlin there's no way he would have stuck around unprotected knowing that there was even a 0.1% of a live Lalo showing up at his door.
Kim feels directly responsible because, in a way, she is. She didn't press the trigger, but it's her actions that directly led to Saul not taking any protection as far as Lalo goes, and to keep going on his capers etc instead of focusing on protecting himself and his wife in the first place.
