Stock Market from 1966-1982 - Nowhere????

There is a fact that is bandied about quite often lately that the stock market really never went anywhere from 1966-1982.

I thought I would plug in some numbers into FIRECALC to see if this was true. I plugged in a $100K portfolio with zero withdrawals and 100% in stocks. zero expense ratio.

At the end of the 16 year period from 1966-1982, The portfolio was worth over $250K. This is hardly going nowhere. Can anyone explain any of this to me?