Is the implication supposed to be that we should just have stuck with the N word and the F word because whatever we replaced them with would eventually come to be used the same way as the original words?
The implication is that people will use whatever tools are available to be shit to one another - someone that cannot be altered by updated terminology.
I don't think there's an implication per se. It's just a description of fact. This has happened before, and likely will happen again. It's helpful to be aware that we're in a cycle rather than a one-time process.
There are people trying to call out Montenegro for its name, and there are people that use "get help"/"you need therapy" as an insult. The treadmill never ends and it's trying to eat everything
Or is it that using the "euphemism treadmill" may help us slowly move toward a healthier world?