Learn English – What’s the meaning of ‘sick to death’

Your explanation is exactly correct. I couldn't have said it better myself.

"And then only" says, "Is the first condition met?" In this case, the first condition is that the user consents to releasing information. Yes? We have that consent? Then and only then we have to ask ourselves another question. "Will the information help to fix a problem that the user is having?" Only if the answer to BOTH questions is yes, may we extract the information. If the user denies consent ("No, I will NOT tell you what operating system I use") -or- If no answer the user gives will help us solve the problem, then WE CAN'T ASK!

That language very typical of the language you will see in employee manuals and such originally written in English.

If someone starves to death, they are dead.

If someone starves to the point of death, they are on the cusp of dying due to starvation, but have not yet done so. If they do not get food immediately, they will die. Your friend was using it as hyperbole, or dramatic overstatement.

Of course, if someone really were starving to the point of death, they would be unconscious and couldn't eat, and would need intravenous nutrition.

This is not to be confused with at the point of death, which means "at the moment that death occurred". It is particularly used for legal stuff related to what happens after someone dies, but is used in other contexts as well.