not wrong, but also not much of a problem I think. Consider an unsigned 64 bit integer for amounts. If we use fixed denominations of powers of 10, eg (1, 10, 100, 1000 …) there are only 20 denominations from 1 to TenQuintillion. Or if we include 5’s eg (1, 5, 10, 50, 100, 500, 1000) then there are 40 denominations. So if Bob has 100 and need to make payment of 76 to Alice, then Bob performs a reissue with input = bob: 100, outputs = alice: 50, 10, 10, 5, 1, bob: 10, 10, 1, 1, 1, 1. The same works at every power of 10.
Blinded DBCs are about the closest thing we have to digital cash.