"there" is a pronoun in your example. You're saying "pronouns were not there" in a ye-olden format, and "there" is standing in for a place (meaning has changed over time).
'Way back when, yet still in memory, English had no pronouns."
Imo mocking the term they use ("pronouns") harms the cause. Mocking incorrect usage of the word doesn't do anything but provoke eye rolling. They don't mean literally all pronouns and they know we know. Mocking them like this just gives them an easy out and makes uncertain readers feel like they're not being taken seriously, thereby pushing them towards the right.
As to not having neopronouns "back in my day", a lot of neopronouns are surprisingly old. Ze is from the 1860s, hir from the 1920s. Even relatively new ones like xe have been around since the early 70s.
And they may be pointless for you, but they're valuable to some people so why be rude about it?
That reads as "they exist so they are valuable not "heres how they are used, and why they are thus valuable"
Something existing for the sake of existing does not make it useful.
Personally I think being rude in this age is actually rather respectable considering most people try to throw around fake kindness and sympathy for some sort of social brownie points. plus if im in the wrong.. why care? i never understood why people get emotional about someone elses opinion when they think they are in the right. i ant a supporter of anything political so not like i avoccate for supressing it, so come down.
I think the point some people try to mke is that they should be free to use the pronouns they seem fit. Forcing someone else to use language they are not comfortable with is just as rude.
"Let me use whatever language I want!"
"Nope! That is rude!"