I like to say it like this “If your inclination is to draw with ball in hand you’re probably doing something wrong”. The rule of thumb is there because it’s harder to place the CB where you want it. You can try this yourself; try to follow the CB 1ft, 2ft, 3ft 10 times each and then try and draw back 1ft, 2ft and 3ft 10 times. You will find that the on average you can judge the follow much more precisely. Then do the same thing at a couple of angles. This will convince you that drawing with BIH isn’t “usually” the way to go.
But the draw with BIH comes up all the time for various reasons. Lets say you have BIH the money ball is frozen 2 diamonds away from the corner on the long rail and your last OB is frozen 1 diamond away from the opposite corner; what are you going to do? Are you going to go around 3 rails? Do a stop shot? Well of course not; you will probably just draw back off the rail a couple of feet. If you draw back 3ft your fine, if you draw back 1ft; you’re also just fine.
Like all blanket rules there are always exceptions and when you are about to break one it is always just fine as long as there is a good reason for it. If you are saying just because “I feel that’s the right shot” or “the shot I want to take” the chances are you are not taking “the best” shot. It isn’t necessarily a blunder. This blanket rule is there because there are a lot of players that feel they can judge draw better than follow, 99.99% of the time these players just haven’t done something like the little test above. You can do something like try to draw the CB in a straight line and then try to follow the CB in a straight line. You will find that you can follow in a straighter line.