Board Thread:Theories and Speculation/@comment-25132842-20180329190050/@comment-33156027-20180330161155

If I remember correctly, someone in Naruto said that tenketsu are required to release inside the body and mold chakra, and not everyone have tenketsu points (I can't confirm those info because I don't remember in which episode and by who this was stated). In Lee's case, he can mold chakra (we saw him walking on the water and done some other stuff which requires molding chakra ability, same with Gai. Opening of eight gates needs chakra manipulation tho), but he's just shitty in ninjutsu.