I think the OP stated that blockchains would alleviate the bureaucratic pains of international trade considerably. As bureaucracy requires labour, which is costly, I feel the value proposition is plausible.

Another feature is not related to inventory. Ledgers that have acute accountability features attached, where some stakeholders may have incentives to fake the records.

Like, for example transport truck driving schedules. Drivers are allowed only to drive so much, and there are penalties involved if the drivers don't rest enough. The main accountability measure here is the driving ledger. Whose maintainer has incentives to fudge it (the driver or the employer of the driver).