I dont produce bills. I spend them. I'm only suggesting that the analogy fails when comparing utxos to the' use of dollars (from a wallet to the clerk).
Discussion
The cost to carry and spend 5 bills is still greater than the cost to carry 1. It might feel free to you, but that's an opinion. The cost to carry 5 tons of gold bricks is 5x the cost to carry 1 ton of gold bricks.
Slightly modified consideration is that transportation costs don't scale linearly with weight.
Sure it isn't linear, but it isn't equal either. We can all agree that moving physical items requires work. 5lbs of shit requires 5x more work than 1lb. Economies of scale take effect, but there are still costs for that work associated with moving those dollars whether the spender feels or notices the cost or not. This is a significant portion of the problem with fiat currency in general.