Comments of chapter undefined of Demon Slayer: What Does It Take... To Move Forward?

Im gonna tinker with the demon slayer mark and the different ways it could be activated and used. Yoriichi lived to an old age with it and i like the thought that demon slayers only ever activate it through brute force in the middle of some kind of stress. My headcanon is that if they could only partially activate it, it wouldn't burn away their life force. I could use a bit of help here fleshing this out if you guys dont mind.