First guess that other camels are former people too. So he has to be fast before his mind degrades. Maybe, if he escapes, he can find a way to keep his mind. Because it is not interesting to read he is wiped out. Or, maybe, she will start to make more camels.

Then, princess is just a user of a cursed item, so this item could have other function, not so nice for her.

Then, maybe there are another plot over just camelize people by the spoiled girl happened. Maybe, this gift purpose is to destroy sultan some way.

All very interesting ideas! Let's see what happens!

Of course, there are other version. that princess is really honest and her secret plan is to find some noble servant, who did not betray her. And, maybe, camels are natural, so hero just can understand all animals now.