Your lack of caring for or being scared of schar v’onesh doesn’t change anything other than your perspective.
Should I jump into a fire if I’m not scared of it?
Yes, I know, all t’hi k’eved ham’shames es harav al m’nas l’kabel p’ras. But if you’re not there (and who is?), do it al m’nas.
We learn Torah for several reasons, including that we will be rewarded.