It's like this: Remember in the 50's how women were expected to stay home and raise the children. They were expected to wear dresses, cook, clean, and do laundry, but not have jobs outside the home? Those aspects of the woman gender role have all fallen by the wayside, and while there are backward thinking individuals who want to return to these "good-ole-days," most of society has agreed that these changes are a good thing. That's GENDER. It's a social construct that defines how a person behaves based on their SEX (that thing between their legs).
As the social barriers between what it means to be a man and woman break down, it becomes possible for traditional roles to be reversed. Men staying home to raise children, women taking on jobs in male-dominated fields, that thing between your legs - your SEX - becomes less relevant in defining your GENDER (that social construct). It becomes FLUID; it's now more of a spectrum rather than a binary system of identification.
Does it really change much for you? Not really. If you identify as a male and have male parts, your world doesn't change. Same for females with female parts. How you treat others may need to adjust; if someone identifies as female or non-binary, you may need to use different pronouns out of respect for that person, but that ISN'T HARD TO DO. Beyond that? Your life goes on. Not that big of a deal.
