No offense, but statements like this are a dead give away that a person has never been in a combat situation. I have seen trained marksmen miss multiple times in the heat of the moment. Especially against a moving target. Every round counts.
It's not uncommon to hear this sort of situation occur. I recently had a chance to listen to presentations by 3 different cops who had been very seriously injured in shooting situations with single armed attacking suspects.
One cop only fired a few rounds and hit with each round, claiming to have resorted to training and practice which had emphasized the importance of the basics, including focusing on sighting.
Another cop said that a couple of magazines had been fired, without making hits, until he realized he was to run out of ammunition (mags) and finally settled down to making 2 aimed shots, both of which hit the suspect.
Another cop related how he had been hit with 6 rounds (I think, but I'd have to check my notes) and seriously injured, and watched 2 other cops being shot at, one of whom was also hit and down. The suspect sustained some hits which didn't immediately stop him. The cop said he struggled to place his front sight on the suspect's head and rapidly fired what turned out to be 3 rapid shots, all of which hit the suspect in the head and finished the shootout.
You may never know how many rounds you'll need if you're involved in a shooting situation, or how well you'll be able to call upon your skills in a stressful situation, or whether your skills will up to the task, I suppose ...
It is also funny how people pretend it is something bad to try and suggest the best gun for someone who has little knowledge about them. Especially after they try it and like it. Like it is somehow a negative thing to defer to someone else's judgement if they have more knowledge and experience.
Not 'bad', per se, but maybe more like difficult and of potentially unknown or questionable usefulness. It would obviously depend on the knowledge, experience and skills of the person for whom the handgun is intended.
If someone wants help, and is interested enough to ask for it, that's one thing.
If someone doesn't want help, and doesn't ask for it, that's another.
If someone doesn't want help, but yields to a friend, family member or significant other who is determined to help them, that's also a different situation. Is the recipient acquiescing to the help-minded person just to make them feel better? Is that a good thing in that particular situation? (I don't know.)
Then there's everything else in between.
If someone yields to allowing someone else to make a choice on their behalf and it turns out to be one which places the recipient at some potential disadvantage because further training, familiarity and practice isn't going to occur ... but now everybody feels better about a choice having been made ... is that going to be good thing for those people in their lives?
That's one of the reasons I don't get involved in the practice of recommending specific handgun platforms anymore.
Personally, I prefer to expose folks who ask for my advice about choosing defensive handguns to as many examples of handguns which they think they might like, or find easiest to use, and have them spend as much range time as may be necessary for
them to be able to make up their minds ... and then I don't try to change their minds and risk compromising their confidence in the weapon or their abilities with it.
I wouldn't fall into the "you pick one for me" situation, myself. If someone wasn't interested enough in the first place to devote some attention and effort in considering changing from one platform to another, I'm not going to make their choices for them. Anyone else can certainly feel free to feel otherwise.
Did I say this wasn't an easy situation? And that I didn't have an answer?
Only you and your partner know the best answer for this situation.