I'm not saying I agree with them, but I think they're saying that for this particular symptom to manifest, the problem has existed, unchecked, for quite a while, and that's why their cat owner/parenting skills might be questionable.
I can only really speak with any confidence on the parenting side of things, and I can tell you that peeing on the ground is a perfectly normal occurrence for a kid who's undergoing potty training. As for cats, what I've gathered through osmosis from other cat owners is that the moment something happens to their litter box, they'll stop using it. There's probably other problems that would have earlier warning signs, but I would expect many to have no earlier signs than peeing in random places.
Only for people who clearly cannot be bothered to take proper care for a pet, which is a frightening amount. Most Americans also think the normal size / look of a cat is an obese one, and that healthy weighting cats are "too thin".
See, this is why I love pizzacake threads. We've gone from "I don't think this is very funny" to "if your cat pees you are a terrible person or maybe an American" in record time.
There's a pretty good chunk of time when cleaning up your kid's pee without losing your cool is all the situation calls for. Could be a baby who isn't even aware they're peeing but needs to air out their diaper area to prevent a rash. Or a toddler you're attempting to potty train. One of the most common potty training methods involves them just being naked and you trying to get them to the potty whenever you notice them peeing until they get the idea. And you doing anything other than being chill about it is gonna cause anxiety around them learning this new skill.
One of the main reasons a cat might pee outside their litter box is a disrupted routine. I can't imagine how that might happen if you have a newly mobile baby. Must be because this person is a bad parent and cat owner.