Wherever you grow there are going to be products that will be purchased to help your plant grow. Let the mystique of products and genetics go. Yes higher wattage lights help produce more, yes watering more times a day encourages growth.No you do not need to focus on these to grow your own. Consider all the attention a seasoned grower directs towards their plants. Each method used to grow can be mimmicked by growers of every experience level. Simply growing out a plant can be a more difficult task than experimenting with bending, snapping, and topping.
An untrained plant can be less forgiving than one with more tops or leafs which allow for a quicker response to stress. Training done early on in a plants life can strengthen itself from future damage, a more mature plant trained too late may not have the time to develop appropriately.