blocked information.
I feel like there's a difference between "hard to read from your end" and intentionally "blocked"
If it works the way I think it does, health only matters on the client who has it. When it reaches 0, they die. I don't know if there's any way for a different client to tell how much it would take to kill them.
Contrary to what I just said: There is the player health variable, which might indicate it's not bound to the client, but is in fact in the 'physical' player's data.
I don't know about client-sided, but I'm sure a server mod could do it.