Mods and cheat engine

[Melorie]

give unfair advantage and harmless tools that only affect your game client.

But again this goes to a zone of what really affects you. Someone wearing a custom hair, make up, taking better screenshots than you, finding a way of dealing with ping or even knowing that they better go left instead of right in a trial will never impact me.
I can consider it a crutch, and do not use it because otherwise this will make enjoy the game less... And still not be impacted by others using it. Unless you're actually feeling you're competing with someone in this game, into which case, imo, you're playing the worst game ever to have this sort of attitude. The difference here is that for many people, the concept of "harmless" is way more broad and accepting than yours. You're feeling harmed by things that basically can't harm you.

If you're actually playing PvP and get impacted by a bot or a hack, then yes. This is actually harming your own experience. But for PvE? Balance in this game in PvE is simply job balance, it's not you against other people. This power trip doesn't exist in FFXIV, only in your own mind. The only possible way to compete with other people is actually by installing a third party tool and seeing if you're doing more DPS than then... And even so, you're into a group-setting so there's no reason to compete with the people that are working with you towards the same goal (clear a fight).