Maybe the upvoter wants my comment to be more visible because they are also interested in other people's opinion on this, but didn't have anything to add to what I said themselves.
I think you took my comment more seriously than I intended. Anyway, I don't sort by karma because I find it confusing to follow conversations when comments aren't listed in the order made. But I'm not trained by Reddit (or where-ever the sort-by-karma norms are coming from).
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.