It’s a general societal expectation to be saddened and shocked by death.

Given how much he knew about the alien tech, youd thik he would use it to be immortal, or at least very long lived.

Yeah, honestly, if anything, congratulations are in order: if you die in your 90s, you did quite well in the longevity contest. Most people die before their 90th birthday, many long before. Not too many people make it to their 100th birthday.