I will take getting old and decrepit over having to work forever for soulless companies amd shit. Then again it's not like I'm gonna see a pension anyways so I'd rather not get that old in the first place and die earlier.

Our society ain't ready for this type of shit, get everyone to be young forever and most of us will be living sad lives working forever to make someone else richer. And furthermore you'd have a lot more old people, who grew up in a different context than young people and don't always tend to accept the fact the world is different now from when they were young, but they outnumber young people by such a huge margin that the voices of young people will be completely ignored and societal change will happen at a slow crawl, if at all, with a good portion of the population being unrepresented because "gotta cater to the majority if you want enough votes to win"... no thanks.

The world doesn't need more old people and I sure as shit don't want to live in an even worse world than I have now. With climate change and all.

Also I'm not sure if the wording in your first question is correct because, as it is now, it reads like if I don't like extending life to eternity (assuming you don't get shot, etc etc) then I must want to be old immediately which is a completely stupid jump to make so I'll assume it was misworded.