Does anyone else find it kind of exhausting to have to justify your choice to people who already have kids specifically?

I've noticed this pattern and i'm curious if it's just me. When i tell someone my age or younger that i don't want kids, they usually just say "fair" or "same honestly" and we move on. But when i tell someone who already has children, it almost always turns into a conversation i didn't ask for. Like my choice is somehow a comment on their choice, and now they have to defend theirs by dismantling mine.

The most common thing i hear is some version of "you'll change your mind" but what i find more exhausting than the words is the tone. It's so confident. Not mean, usually, just absolutely certain that they have access to my future self that i don't.

I had a professor last semester, genuinely lovely person, who found out during a casual conversation after class and spent the next ten minutes telling me about how having her daughter "rewired her brain completely" and that she used to think she didn't want kids too. I nodded and smiled and then went home and felt weirdly unsettled for the rest of the evening. Not because she changed my mind. Just because it's tiring to be treated like a person who doesn't know themselves yet.

I'm not asking anyone to validate my choice, i'm realy not. I just don't want to have to re-explain it every time it comes up. Does this dynamic feel familiar to anyone else or am i reading too much into it.