There is a time and a place I think. In general most plants produce more leaves than they need to counteract things like weather, insect, disease etc etc damage. It your running a tight ship in your room and no leaves are lost this way then some defoliating is ok and in some cases important to allow airflow depending on your grow setup, especially later in flower when you want your buds to have air moving around them to help avoid mold. By this time the plant does not require so many leaves anyway imo. I take out leaves quite freely 2-3 times to open up the space, get light to the lower branches, air flow etc, just do not overdo it as like everyone says, the leaves are the fuel tank. I do not see any reason for you to do anything to your plants, they are just beginning their journey.