I assume, these quotes basically mean that Satoshi wanted Bitcoin transactions to cost low.
From these quotes I understand that Satoshi wanted to convey that the costs of mediation and the oligopoly of financial institutions is what makes micro-transactions impractical. You must have noticed as well that some merchants will hesitate to accept card payments for a soda drink or cigarettes. The cost of the transaction fees may significantly cut into or even exceed the profit margin on such low-cost items.
However, if we take into consideration the fact that Satoshi was thinking of the blockchain growing by 100 GB every day, then it's probably plausible to assume he'd envision cheap on-chain transactions. As I have mentioned before, Satoshi is not the ideal figure to be regarded as the unquestionable authority or ultimate arbiter of truth for Bitcoin.
You send Bitcoin from your address to another address, this is perfectly legit and doesn't abuse anything while ordinals send images.
And Ordinals send dust from one address to another, which is perfectly legal from the protocol's perspective. They don't abuse anything.
You can't ban centralized exchanges, that's impossible, you can't prohibit someone from getting coins from multiple people.
You can neither prohibit someone from using the blockchain as a storage.