I love this comment because it provides an excellent teaching moment.
I am probably speaking for every conservative man, but I will personalize it to just me. I have an 81-year-old mother that I care for, a wife, a daughter, a granddaughter, a mother-in-law, two sisters, and numerous nieces. So, you see, I'm invested in women. I came from one and care for all of them in one way or another and to varying degrees - and they care for me. So, I have an interest here. It doesn't mean that I have to speak for them. It does mean that I have standing to express my opinion.
"Mansplaining" was invented to swat away that clear investment and interest. I'm not easily swatted away. In addition, my views of things that affect women are supported by the women I have an investment and interest in.
And here is the teaching moment - I would point out that leftist progressivism doesn't give a hoot about my girls and my women. They only care about women who support their sick agenda - which is to blur the distinctions between men and women, deny them, and break apart the natural roles, connections, and dependence men and women have with each other. It is an essential part of disintegrating society to replace it with a neo-Marxist utopia. That right there is where a concept like mansplaining comes from and why it is used.