As much as I believe that what other people do isn't really my business, I simply do not 'get' women who do not carry purses.
Some people are just different and that is ok with me.
Something I have noticed is women who don't carry purses typically are don't wear make up or wear particularly nice or elaborate clothing and overall are not concerned about their appearance so I guess they have no real need for a purse?
I'm not sure I understand the connection between wearing makeup and nice clothes and having to carry a lot of stuff with you.
I often run out with just a wristlet, it doesn't mean I don't care about my appearance. I put on makeup before I leave home, so I don't need to carry an entire makeup kit with me.