While your response is well worded, and seems well thought out, it lacks humanity, mercy and dignity.
One would not "let" Terri "go", Terri will have to be killed, because she is not being "kept" alive. So, there is no "Letting go" there is only the option of murder. To murder a vulnerable humanbeing who may not have value in YOUR eyes--but tremendous value to her parents and sibliings, and ME.
It sounds all warm and fuzzy to say that it would be "more humane" to kill Terri than to let her live as a "potted house plant"...but, if Terri is in such a detached, mindless state, what will it hurt her? According to you, she is unaware of her state or her surroundings--and so her pride isn't hurt in the least. So, there goes your argument! If she is unaware, then the only "inhumane" thing would be to put her parents through the torture of her impending, inhumane, painful death.
Listen, Mr. Felos, the only one who would be in pain, if Terri lives, is Mikie Schiavo--and you.
And Gondring and Hildy and KDD and... ad nauseum.