Why would anyone be?
Problem I see is people buy physical silver; and they have it shipped to them wasting extra fiat to move it there so that it can just sit doing nothing still.
Then if they decide to sell they have to ship or give to someone else
by eliminating the shipping charge; someone can hold the silver and maybe charge a small fee to transfer ownership by selling to someone
The buyer pays less because there's no shipping and the seller doesn't have to deal with moving it himself
Sort of like owning a stock
The whole idea of owning physical silver/gold is that it is on your hands and not someone else's. Without that feature, it's essentially no different to paper silver.
It's certainly close but hopefully the big difference is it's not some big bank or corporation holding it but a trusted person who eventually would be that small business owner of a silver storage and exchange