Yes, but Blizzard also offers a development toolkit and a monitored channel for add-ons that the playerbase has embraced. SE needs to do the same thing if they really are serious about this game on the PC platform. I'm not saying that it would stop all cheating, but a lot of the functionality that folks like me are looking for can be easily provided by an add on and then it would no longer truly be "third party tools" it would be add ons in the game that SE can break if they don't like what it does.
SE wants to bang their heads against the wall and fight modern mainstream mmo standards though. So people will continue to make things like Windower, Apradar, FFXIVapp and others and completely bypass any checks and balances, period and all some of us want is a basic freaking dps counter.
The bigger issue is why these things are needed\wanted at all. Broken systems are targets for exploitation.