Social Insecurity

According to the Social Security Administration, I shall retire no earlier than age 70 to obtain full benefit, if I plan earlier retirement (say 67!!!), I shall not qualify for full benefit until age 78.5, this is my calculated break-even-age according to SSA. Interestingly, based on SSA’s Period Life Table I am only expected to live until age 76.84. Are we screwed or what?
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