The practice of concentration and the practice of Pranayama are interdependent. If you practise Pranayama, you will get concentration. Natural Pranayama follows practice of concentration. A Hatha Yogi practises Pranayama and then controls mind. He rises upwards from below. A Raja Yogi practises concentration and thus controls his Prana. He comes downwards from above. They both meet on a common platform in the end. There are different practices according to the different capacities, tastes, and temperaments. To some, the practice of Pranayama will be easy to start with; to others, the practice of concentration will be easier. The latter had already practised Pranayama in their previous births. Therefore they take up, in this birth, the higher limb of Yoga, i.e., concentration.
This life is too short and too precious to be wasted away in worrying what people think and say about us.