The point is it’s backed by an asset
Yes it's still backed but less than before, i.e., devalued.
1 Trillion in Assets = 1 Trillion in Currency.
1 Trillion + 1 dollar in Assets = 1 Trillion + 1 Dollar in currency.
No dilution by the Fed.
(Fractional lending notwithstanding - that's another can of worms)
But you cannot eat a dollar or play games on a dollar or drive with it. In and of itself a dollar is just a piece of paper and has an intrinsic value of say 1ct.
So adding a paper note to the economy increases the backing by 1ct and the currency by 1$. Adding an iPhone increases the assets by say 100$ (just made that up by taking 500$ cost - 400$ used materials) and leaves the currency as it is.
Hmm, now that I think of it: Are you maybe talking about accounting?