Most mountaineering accidents don't happen on the way up a mountain. They happen on the way down, when energy and oxygen run low and there's no room left for error.
Retirement works the same way. For 40 years you climbed: earning, saving, riding out every market dip because you had time to recover.
The moment you start withdrawing, the rules change. We call this the Drawdown Trap.
If the market falls 30% early in your retirement while you're taking withdrawals, your savings may never recover, even if the market eventually does. Economists call it sequence-of-returns risk. Retirees call it running out of money.
A fixed indexed annuity is one of the few tools built specifically for the descent: your principal isn't reduced by index losses (the floor is 0%), and an income rider can guarantee a monthly check for as long as you live.