Mentioning third party tools by names, is endorsing them. Certain tools, particularly ones mentioned in this thread ARE cheat tools. If it reads the games memory, injects itself into the game, or otherwise changes anything IN the game client, it is the definition of third party tool and cheating.
What doesn't count? External tools like network monitoring, ping, traceroute, etc, and tools used to capture the screen or improve the render quality, because OBS used for streaming and NVIDIA's DLSS/AMD's FSR features do operate the same way cheat tools do by definition (by intercepting the screen before it's displayed), but they only affect the game image AFTER it's been rendered. It doesn't reveal information the player isn't supposed to know, it doesn't call out information the player shouldn't be able to know, doesn't add overlays (other than FPS or GPU temperature or something like that, which isn't game data, but hardware performance.)
The trouble comes from how SE enforces this rule. Mention certain things, either on the forum, or in the game, and you will find yourself banned. You think SE doesn't know about these tools? I assure you they do. I bet their internal policy is "no crackdown unless reported".
Speaking of which, you know why SE can do ban waves easily? Go back to this thread from 2015:
https://forum.square-enix.com/ffxiv/threads/226596
Notice something? Those incessant spams are pretty much gone. Yes, the "say" spam still pops up in the major cities, but there's no longer any shout/yell spam. Those spammers would create accounts, spam for several minutes, and then delete the character and repeat. You know what enables spam? the same tools people defend as quality of life junk. Anti-cheat's do not stop spam. Anti-cheats only stop a certain subset of players who are too lazy to write their own tools.
This copyright ruling only matters in that the people were "selling cheats" that utilize, interact with internal API/structures, or otherwise modify the game client. The program everyone loves to defend as harmless, does all of this. So yes, I could see a day that every player using it gets warned to stop because a crackdown is coming. But they also know if they blindside the userbase with a crackdown, that will probably send a large chunk of paying customers fleeing.
FFXIV is the only MMORPG that doesn't operate invasive anti-cheat stuff, and has instead relied on server-sided means to detect nefarious activities. Most of the obvious cheating stuff I used to see on a daily basis is gone or is so much less visible than it used to be that it's not distracting. If anything this just proves that anti-cheat programs are not effective at doing anything but chasing people away from the game.