Bitcoin Transaction Fees and "block rewards" are incentivizing mining and re-imbursing the computational effort. It is not a fee that pays for storage.
Data gets stored for all of eternity and as the network grows ever more redundantly. Fees cant pay for that. Participants are willing to store blockchain data for free, because they benefit from being able to use bitcoin because of it.
The same benefit does not exist for any non-transactional data.
I think too few people are aware of bitcoin fees not paying for the storage side of things, which is an important fact to consider when weighing arguments in the core30 vs knots debate