I don't think it's lazy at all, I think it can be a valuable stage between having them strapped in a pram, and trusting them to walk alone. My sister used reins on Oli, and is doing so on Max now he's walking. Both she and I had reins on as toddlers. I remember ours had a white leather harness, I think it had a baby deer or a duck painted on the chestpiece.
A really neat idea is the little rucksack, with a lead attached. The kid can have their own little bag to carry their bits and bobs in, and walk with a feeling of independence, while Mum keeps them quietly under control.
Just because some parents who use them are lazy, doesn't mean they are a sign of lazy parents generally. I defy anyone to call my sister lazy. I go and stay, and come back knackered!
The long curly wrist straps were in fashion for a while, I think it was partly to avoid losing a child in a crowd, and possibly a hint of hysteria about kids being snatched. They got bad press after a few instances of kids getting stuck on the wrong side of doors, lifts etc. A short webbing strap is better, so that the child can't get too far separated from the parent.