First, amateur, no one is compelled to carry a damn thing. Secondly, it’s no more going to rot than is the rest of your gear if you take care of it.I’m just wondering why anyone would feel compelled to carry a tourniquet. It’s just going to rot in your dive bag.
Lastly, as a former combat medic, I can confidently state having it and not needing it beats the **** outta needing it and not having it.
Have fun, amateur. Hope you never need one.