Re: Why Tobirama and Hashi>>>Minato.
Look, you god damn broken record, no where has it been stated that hashirama's healing is automatic. The only thing said about it is it is on a level beyond Tsunade's and requires no hand signs. Once she turned on her byakugo, and started healing herself, did Madara say it was similar to Hashirama. But, guess what, the healing wasn't automatic! She had to will it to turn on. No hand signs, just mental focus. I can think of 6 jutsu that have the same damn set up: Rasengan, Tsukuyomi, Amaterasu, Susanoo, Kotoamatsukami, and Kamui.
Unless you have an actual panel that explicitly says hashirama's healing is permanently on, shut the hell up.