What an ignorant comment. There's evidence to suggest walking attachment devices for young children were used way back in the 17th century. It's possible that similar things were used earlier than that too. An early version of the modern one we are all familiar with now, started selling in the 1920s. Incidentally, use of it skyrocketed as more and more cars, faster cars and busier roads spread across the modern world.

And another thing, use of these leashes is common for parents of kids with disabilities. I have to use one with my son because his learning difficulties mean that he doesn't understand danger and if he gets frightened/overwhelmed he will often run away in a panic.

I don't like using it but I would rather have my disabled son safe and alive than not use it, and judgemental attitudes like this are the reason that I have to put up with unsolicited, nasty comments when I take him out in public; when I'm already dealing with the stress of keeping a child with extra supervisory needs safe and well.

Or is it yet another example of social decay, that parents can’t even discipline/raise their kids well enough to allow them outside without leashes?

From what I've heard, the expectations of behavior for children in public spaces has gotten a lot more strict. People generally have very little patience for your kid's antics. Also fewer mothers are dedicated homemakers, and when time and energy are tight, a leash might be a good bandaid.

I think it's more the fact that kids weren't really brought to busy markets/stores 100 years ago, nor were there busy streets full of cars everywhere. They stayed home or just in the local environment, and typically mom would also stay home to watch them and make sure they stayed out of trouble.

This isn't an issue, it's used by some parents with very small children in busy areas like amusement parks or if they have special needs, but hardly anyone actually cares outside of comedy skits. Nobody actually feels shame or anything. It's played up for laughs.

There's like 20% of every Lemmy/Reddit post about things like this from people who are thinking WAY too hard about things.

Kids are incapable of resisting their urge to do something to a certain degree at certain ages. Like suddenly running onto the street for example. Some kids just do this, and then your only option to keep them safe is a leash.