I cannot have a fast feedback if I don’t have small batches.
But, I could have a slow feedback even if I have small batches.
That’s the case when WIP is too high, which causes queueing in the system, which then delays the feedback.
The problem, which is often overlooked, with not slicing the work is incurring all the opportunity cost of not doing something else more valuable while working on the less valuable parts and thus missing a chance to increase the throughput of the value.
High transaction cost incentivizes for big batches. And lack of availability, causing long waiting times, drives the transaction cost up.
I.e. the more something is rare to find, the more valuable it’s perceived as.