I would have imagined that it is just as important for a dual engine failure scenario.
If both (all) engines have failed then there is probably a common reason - such as fuel starvation (e.g. no booster pumps?), volcanic ash? icing? etc. so until you are back in the relight envelope and away from the ash, ice etc. (or below the gravity fuel feed ceiling if no booster pumps) then relight attempts will be futile - so you may as well crack on with the more important stuff.