The basics are just that, techniques. If you're looking to use a 'technique' against a good fighter - you'll lose. Fighting can be a messy thing. This is why weaving your body through a full range of movements with all the basic principles and power sourcing methods in place will get you used to a variety of positions that you're likely to find yourself in and exercise both mind and body in a full range of movemnt. 'Bunkai' means to 'break down and study' and it's good to do just that, every tiny part of a movement used in a variety of ways and 'in your face'.