I'm going against the grain. OP, I think you were fine. It's not on you to sugar coat something in case parents get offended that other people don't enjoy having to shop around kids melting down in the aisles.
Not everything in life has to have a positive spin put on it.
I think I agree with this. If someone asks me why I don't like to shop at Walmart, I do not hesitate to say it's because every single time I go to a Walmart, there is at least one, if not multiple, children screaming and crying and I can't get away from it. If someone identifies a little too closely with that, well, I think that's their problem. I don't feel the need to apologize for not liking the sound of children screaming and crying.
Nobody asked the OP this.
The lady *may* have been sort of asking, "why do
you shop there."
But even then, I think there are less fraught ways to say things like this. The rest of us shouldn't have to listen to the details of your pet peeves, etc.
It's uncomfortable for us to listen to. And it opens the door to an extended conversation (as happened here) that is even MORE unpleasant to be in.
The lady who vented about rude kids (and the OP's "tantrums" comment) were really unfair to the listeners. It's an unpleasant topic--I don't want to be in that conversation at a social event or whatever.
It may be true. That doesn't mean you are polite to share it.