Did we expect it to grow forever?
If not forever, but if 200-ish becomes a norm, it would be super awesome. Now, it is like, “Awesome, I know this, I know that. I need to learn that.” “Hold on, time to die.”
I assure you many aspects of a society where 200 years old becomes a normal life expectancy would be a hellscape and not "awesome." We already currently have a massive societal and economic problem with aging populations as things currently are.
The problems are due to what aging involves and the lack of young people inverting the population pyramid; getting us to 200 at all means solving every age-related biological problem, while also meaning we have longer to start a family and have kids to stabilise that population pyramid.
Lol ok so imagine your dream scenario is everyone, magically and with equality, is able to live and reproduce to absurdly long time frames - that’s also a hellscape in so many easily imaginable ways. you’ll start to see jobs requiring 100+ years experience or with the right genetic modifications to make you insurable enough to invest a 60 year career into. Since this is all science fiction, we can imagine all sorts of things as we understand this is fiction. My only real point is this isn’t a utopian future. we can’t deal with the amount of humans we already have at the ages they live to. I don’t see what solving aging does to solve any of these problems.