Some folks might occasionally have some unrealistic expectations about ...
... the "effectiveness" of handguns
... their own skillset and ability to accurately make effective hits under stress and duress
... their caliber/ammunition choices
... how people may react when different tissues, structures and organs are wounded by bullets fired by most handguns
... their own ability to direct their hits to the more critical tissues, structures and organs that might be more likely to produce an immediate cessation of an attacker's ability to continue to engage in voluntary actions (like their deadly force attack upon you or any innocent third person)
... a 'hi-cap' pistol magazine automatically having 'enough' ammunition to actually incapacitate an attacker, let alone 'multiple' attackers
... having enough time to actually be able to effectively use any of the ammunition in any handgun being carried, especially if caught by surprise
... their fired rounds not endangering innocent persons 'downrange' of their intended threat 'target'
... being able to consciously and effectively function when subjected to the physiological effects of the hormonal fear response ...
... being able to 'prevail' against overwhelming odds (multiple 'attackers') if they've never actually taken any training to prepare them for such a situation
... 'rising' to the occasion without any previous training and experience applying their skills in an unexpected dynamic, rapidly evolving and changing chaotic event
Then again, this is what some people like to fantasize about.
If someone is really interested in such things, perhaps a good place to start is to seek out at least some basic defensive handgunning training. Preferably something which includes some knowledgeable discussion and training in how the laws work and are commonly enforced when it comes to using force - especially deadly force - in different 'self defense' situations.
Maybe seek out some shooting classes or private instruction to better prepare themselves in how to really run their gun under conditions more demanding and stressful than just punching holes in paper while standing comfortably still, balanced and relaxed at the local target range. Think about trying their skills (and equipment) at a local IDPA or GSSF event?
Think about their method of carry to the same extent they do regarding their choice of handgun and ammunition?(Is it safe, of very good quality, as well as being practical and appropriate for
their anticipated needs, using
their preferred handgun, while wearing
their clothing and engaging in
their normal activities?)
Do they know
how to clean and maintain their chosen handgun so it will actually function in an optimal, reliable manner if pressed into service in an emergency situation?
There are so many things to consider, and this isn't by any means something approaching a complete list.
Some suspect not being "stopped" just because he/she was hit in some unknown part of their anatomy by a handgun round? How very unsurprising. Then again, cops have been killed after being wounded by a single .22 round.