That this topic is still alive is testament to media power. Lots of money and talent has been used to convince us that a long life is a worthy goal. At the same time the governments and insurance companies put age restrictions on treatments and drugs.
Ride the bike/trike. Walk and run. Lift weights. Have an excellent diet. Do all those things so you can enjoy today. Don't ignore the future. You may be part of it.
But, for most of us old age is, or will be, a drag.The machine in which we live requires much more maintenance and is more vulnerable to all kinds of disease and accident.
A common complaint of really old people is they have outlived most, if not all, of the friends they raised families with and with whom they shared life's important events.
Nope, living to 100 is not a worthy goal. Doing what is necessary to live a vital life now is. Plus, it may give you the energy and strength to do more than endure old age.