I don't remember anybody saying these junks aren't going to be traded. After all scams will always find their victims. They just change tactics and sometimes get more complicated with a prettier front making it harder to detect the scam underneath. I remember the early days one of the most popular scams were "bitcoin doublers", they started by convincing newbies that they had "found a way" to double their coins in 24 hours if they sent them their coins. Eventually it became a thing where they no longer claimed to have any kind of magical exploit in the protocol and just came out with it and said it is a Ponzi scheme and people still sent them their coins!
You're absolutely right the scams will always find their victims and the scam of ordinals are also getting their victims in order to show them that they can earn huge amounts by investing their real Bitcoin for those stupid jpeg files that are valueless and they doesn't even contain the elements of quality that one should even spend a $1 of those useless tokens. They have just found their way to convince those who don't have strong will power or deeper understanding of the things, and those well known manipulators who created those ordinals earned enough money from their scams that they would enjoy their dam lives by creating much congestion on the network of Bitcoin.
The two are not comparable though. When fiat like dollar is printed, it makes it worth less not worthless (that is to dump in value!). Whereas the Ordinals junk is just junk and it is worthless because unlike things like fiat it has no utility.
NFT's are not ordinals and they are totally different from each other. The NFT's are not created in a way that they might cause any kind of network congestion while the useless ordinals are known to cause congestion in Bitcoin network. Those useless tokens are worth nothing and that's why it's better to avoid those at any cost. The only similarity between an NFT and an Ordinal is that both of those are just useless jpeg files and nothing else.