They're is used for writing not speaking, say, "They are."
Uhm, imho you got that reversed. ;-)
While you may argue that it should be used in neither spoken nor written language, I personally always believed that when written this was informal written language derived from speech. If people would say "They are" then I dun think "They're" would've found its way into written language.
Again, you would be right to say that the contractions (which I believe find their origin in lazy speech rather than lazy writing) caused the problem in written language here. But to say it should therefore be integrated into written language whilst removing it from spoken language would seem like the world upsidedown to me. If it's that harmful, removing it from both would seem more logical.
But then again, I am by no means certain of the validity of my statements. Nor do I have any validity, being both uneducated in English grammar and a non-native speaker of the language. So ah, well... just thought I'd say that what you said seemed odd to me.
"We must face the fact that the preservation of individual freedom is incompatible with a full satisfaction of our views of distributive justice."