I just want to add that the letter A, like all letters in the alphabet, is in fact a social construct. It’s totally a social construct to take a symbol writing on paper and attach a sound to it. Further more, depending on the specific pronunciation, other vowel combinations may at times take on the same sound as the letter a. For example, the sound of e in “hey!” Sounds similar to “hay.” At least in the us where I live. I imagine you may be British and perhaps pronounce things differently…yet another example of a social construct that can vary from culture to culture!
Trans people understand biological sex. None of them are arguing against that. They just argue gender exists in addition to biological sex.
But then again, here I am adding my chaos of which the feminine comes from.