I would not look on this as an issue of respect/disrespect.

I see it as a difference in vision of the LDR.

She wants something in the LDR (the ability for her to go silent without notice) that you don't want. You've discussed it and neither of you, evidently, is willing to change their views on this aspect of the LDR.

The question in my mind, then, is this:

When does the issue become a dealbreaker for you?

Also, aside from the above, I would note that you are now in your fifth year of this relationship. I gather that there are no current, realistic plans for either or both of you to relocate such that an in-person relationship would be possible. So therefore my second question:

When is long enough? When does time itself become a dealbreaker?

If neither of these things ever becomes a dealbreaker, what you are implicitly saying is that you are in fact willing to accept the LDR, as it is right now, as the permanent nature of your relationship. Are you willing to accept that?