You can still die, just not from hunger/thirst.
And you have to hide it, or else governments around the world are gonna lock you to a blacksite and experiment on you. (I mean, you are essentially a weird mutant / supernatual being, governments be paranoid)
Why would I want to hide it? I’m turning myself in and letting them do their best to figure out what happened to me, on the condition that I’m paid fairly for my time (just as with any other human trial). If they can figure out how to replicate it, it would be incredibly useful.
I think any scientists or government organizations would be much happier experimenting on a consenting and cooperative subject than a kidnapped and imprisoned one.