I think you’d struggle to find a “Cisperson” on this thread, if you are so concerned about mis-gendering why do you persist in doing it to women?
I am a cis woman 
How is referring to a woman as a woman, or any subset of it, misgendering them?
Gender doesn't actually exist. You seem incredibly confused.
Saying that something is a social construct so therefore it's non-existent is vast oversimplification and implausible when applied to everyday life.
"Time is a social construct. People can't be late."
"Money is a social construct. People can't be poor."
"Virginity is a social construct. People can't be sexually active."
Something being a social construct does not, and has never, equalled it being unable to impact life. It does not, and has never, equalled it being non existent in the way the world operates. It does not, and has never equalled people being unable to operate within and outside of it.