I will grant you that in regard brass cases. When I think of loading shotshells I DO NOT think of brass cases. I load many many thousands of shotshells per year to support my skeet shooting habit and loading them on any single stage centerfire press I'd never get enough loaded between trips to the range to support the shooting I was to next do.
In the last 3 weeks I've loaded about 2000 rounds give or take a bit most .410s but also 28s which is what I'm currently working on. Beore starting the .410s I'd loaded over 1000 rounds of 28 gauge.
I can accept that for some very limited volume specialty loads it might work but then so will a proper shotshell loader. Now for brass cased shells if that is what you for some reason want to load I reckon maybe it could be better but I never even think of them when I think of shotshells and my answer had nothing to do with brass cases.