The scientific process takes time. We have made intense strides. The technology behind the COVID vaccine and Alpha Fold are already revolutions.

The standard chicken for medicine is:

-discovery of a principle

-designing a treatment based on that principle

-doing the various trials to launch it

-making it available to rich people

-making it available to everyone

This process takes like 20 years. You are what 18? You've got your whole life ahead of you, don't stress anti-aging solutions yet. Plenty of people are working on them and they get here when they do. There is no law of physics that prevents extreme life extension so it'll come in one form or another.