That's enough to kill a man.
Some people don't seem to be affected by caffeine, I guess you're one of them. But there is definitely truth to the addictiveness of it. It can affect your sleep quality if you drink a lot of it or drink it late in the day, which means you never get a proper nights sleep, so every morning you rely on coffee to wake up, plus, you get a tolerance to the caffeine which means you need more of it to wake up.
It’d take more than coffee to kill me But I do agree there’s probably an element of it some people could find addictive. I just like the taste and as they say, everything in moderation apart from excess