I can. Sure the item is great for waveclear, but it also provides mixed damage for armor stacking team and synergizes with heavy burst ADCs. The original person says it's not really meant to damage champions, but the amount of burst it gives says otherwise.
Same can be said about Luden's Echo. It's technically "meant" for waveclear, but you see a lot of poke mages getting it for the extra damage and mid game powerspike of it.
I think you interpreted my post wrong. I wasn't saying Shiv isn't a great waveclear item, because it is, but what I am saying is that it provides huge burst (especially with crit) and mixed damage to help ADCs get through armor stacking teams. I find myself getting this item on ADCs that already have great waveclear, and I am sure many others don't treat this item as purely a waveclear tool.