OK, so this is probably an odd question.
But - would people see the inability to gather in and pen sheep at will, a welfare issue???
Taking the question as written, this
could be a welfare issue, in my opinion, if the animals could never be caught up. If however, you mean that you can't simply walk up to your animals and take hold of them, but have other means to bring them in, then it's just a bit of a nuisance.
Folk seem to be taking the question as a dig at others and I don't think it is, just something to get us thinking.
The thing which does alarm me is when people are unable to round up a struck sheep, and have to wait a day or three before they get help. As fly strike can kill, this is something which has to be treated as an emergency, so you need some way to catch them without stressing them further. We don't have a shepherd dog (just an overenthusiastic Jack Russell who loves to help), nor will our sheep come to the bucket when they see we want them in (but will follow us anywhere if they are going to new grass, or being fed concentrates). When my husband was deathly ill for a long time, I had to devise a way to get the flock in, on my own, calmly (and I can't run) I devised a funnelling system which we still use, in our smallest paddock. It works a treat and no-one is stressed; the sheep know where they are going, and trot in if not happily, then at least resigned to the inevitability. Although there are only some of our flock we can simply take hold of, we can generally get the one we want, plus all the rest - if one comes, they all do
- within 10 minutes. If it's more urgent than that it's because the sheep is down. I can't say this happens frequently, if ever, because we treat our sheep preventatively for fly strike, and keep a close eye on them for other problems.
For lambing problems - we haven't had many of those either and have always managed to sneak up behind a ewe we are worried about while she concentrates on labour.
I don't think that saying 'we see much worse in commercial flocks' is an acceptable argument to allow any genuine welfare issues to happen. This question I think is bringing to the fore something we should all be aware of. And yes, if you don't have time, or ability, to bring in your flock, for whatever reason, within a reasonable timescale, then you need to think carefully if you should have these animals in your current situation.