Your argument rests on the reasoning that he would never let himself be touched by anyone. That's sort of a weak argument. In Mihawk's case, the best reasoning I can come up with for him to counter a Devil Fruit ability is that he is considerably stronger than other individuals. That is the basis for how Kaido and Big Mom made it impossible to teleport them with Law's ability. However, that reasoning also leans into other arguments about a sufficient level of Conqueror's Haki being the crux of it. Concerning Zoro, I would question whether he could turn himself back into a man if he had his gender swapped by Doc Q.
You're not asking about a "Counter",
You're asking about a "Remedy"
Counter means to oppose something, if Kaidou shoots Flames, Zoro counters by Cutting those Flames, that's a Counter Move,
But what you're discussing here is how to reverse something bad that's already happened to you
Master Swordsmen counter DFs the same way Mihawk countered that Bullet when He was introduced, by not letting it touch him,
They won't just let themselves get Hit & then try to find a way to reverse that Harm, sometimes it works, sometimes it doesn't
Teleporting someone means you're also teleporting their Haki, that's why Law can't do it with Stronger Opponents, but spreading diseases into their Bodies or turning them into a Toy or slowing them or changing their Age ... etc doesn't require such Feat, so you can do it with anyone regardless of how much Stronger they are than you
Sometimes the harm isn't Decisive, so you can still make up for the mistake of letting them effect you (Such as Law vs Doc Q), but other times there is no going back, it's Game Over
If DF requires Target's Haki to be Effected, then it matters if They are Stronger than you or not
But if it can only effect the Body alone, then it can work on anyone, and whether it's Reversable or not depends on that Type of Harm
Greatest Fighters completely avoid getting in such Situations in first place,
Getting Petrified by Hancock or receiving a Bullet in the Head are the same, you don't want either to happen to you