they practice with doubt it does not matter if that logic, that technique is 100% true, if the person does not believe it if the person does not do it positively then it will not work what I want you to do you try new way, 10 times at the beginning you make 10 mistakes, I want you to be hungry and be more positive for 11th time that positiveness is crucial so ready, there made mistake, ok I will try again there yes it worked there so, if you do 1 right out of 10 tries you are becoming more successfull if you are practising like that in positive way when you play against better player, you will play positively, because you are trained in that way you know eventually you can beat the opponent because you are the person who have attitude pride and the mindset, after 10 mistakes you are ready for 11th but there are so many players after 5 mistakes the attitude changes and become very negative and then instead of asking questions I got to work harder this player questions coach why it does not work he is blaming something else that is not real sportsman please remember, hitting playing badminton is not only train how to hit the shuttle cocks it also trains, what kind of attitude you must have so, if you are not prepared if you are not ready to be able to challenge 11th shot after 10 mistakes do not even try to be advanced player because without such kind of positive attitude no player will move on to advanced level 