In our current society death is necessary, the succession of power, wealth and economic systems requires it as these systems have death and the succession of generations as an ingrained feature and depend on it to optimize other processes. Imagine having tenure "for life" in academia or worse, in justice.

As we approach the time when serious life extension becomes possible, society will need to transition to systems that include this feature but maintain coherence and ultimately peace.

I personally predict that this transition will be one of the bloodiest in human history so I'd rather we don't get there in my lifetime, making me pro-death until I'm gone but ultimately pro-immortality for the future.