When I had my PFB, I was very anti-reins, but now I can't actually remember why. I remember reading on here about people tutting at the sight of them,comments about how children aren't dogs etc
We had a very different set up with number, we lived in an isolated cul de sac with wide footpaths and bridleways, and it was a lot safer for PFB to roam free.
Now, with my current toddler, we live in a village with narrow cobbly streets and quite a lot of agricultural machinery pounding through regularly. She is also a slippery handed bolter,which sensible PFB was not. She is good at holding hands, but there's a few areas where she could have some independence but would need to be within grabbing distance, if that makes sense.
I've been given a little backpack with reins attached, and she has been a happier child since we started using it on our (now much more peaceful) walks.
I just can't see a problem to be honest. I remember seeing arguments about reins going on for pages, but now I look at her able to explore her environment whilst being safe, and I genuinely can't see what the issue was or why I was ever so against the idea