Having to look at the compass to see what direction you are going during a take-off confirms to me that delaying would be a more appropriate course of action in an AIRLINE operation. Blind take-offs have no place in airline operations
The visibility for take off based upon ATC reported weather is one thing - as is the met reported landing vis. Visibility through a windscreen can be another problem altogether. In Vietnam and some Pacific areas, extremely heavy tropical rain shafts can momentarily blot out all forward visibility while it may not even be raining at the other end of the runway.
The problem has always been that the visibility through a rain affected windshield is what the pilot sees at that instant, and that may be far different to reported visibility on which to decide a take off or complete a landing. All forward visibility can be suddenly lost for a few seconds. When that happens, the last thing a pilot should be doing is to focus on the spot on the windscreen where he last saw the runway, in the blind hope a miracle will occur and the rain ceases as suddenly as it started. Good airmanship would dictate an instant glance at the heading/localiser and appropriate steering correction made to stay on centre-line.