>> Once you start with this type of thinking, it never stops ... you're instead having meetings
Is this an example of the slippery slope fallacy?
There was no meeting required, the idea and action were raised and taken in the same parent post. Parent poster started with that type of thinking and avoided the halting problem.
>> The amount of energy that this takes up is ENORMOUS
Is it possible that learning to use different words in many contexts is the same as the act of picking up a thesaurus? How commonly does it not take such a trivial amount of energy? How commonly do you need to expend an enourmous amount of energy to achieve this end?
>> especially when you're dealing with something as difficult and dangerous as the slave trade
There's a bigger point can be made here, what if you're dealing with a topic you don't know well enough to navigate possible sources of offence? If you don't know, then your 2 choices are learn or ignore, it's possible that both of these are valid choices depending on context.
>> no longer allowed
"Allowed" is quite a vague term for the concept you raise - are we saying law against particular words or are we saying social norm and convention that can be broken in art, in protest, in challenge to the status quo? If it's anything short of a law that expressly forbids particular words, then the rest of your sentence's argument is nullified.
>> Imagine
Or don't. Slippery slope fallacy is a real danger in itself to be avoided.