No, when you shave or cut the hair you do not actually help with the hair thickness and growth. Shaving helps in removing the damaged and weak hair but it does not generate new hair follicles. Similarly with haircuts, you remove the split ends, and damaged hair and as a result they appear to be healthy. Dr Rinky Kapoor bursts the myths of shaving for hair growth in detail in this video:https://www.youtube.com/watch?v=NuelQguVs8A