TPFAP contradicts HOH v. 2 ?

[Jack Fate]

perhaps this has been posted before, but the search function here sucks so forgive me.

on page 68 of TPFAP, Sklansky says "If you are forced to literally throw all your hands away until the last hand where you are forced all-in, it is not so terrible. To give up sooner than that and play a very bad hand is a big mistake."

Yet in HOH v. 2 on page 143, Harrington advices pushing all-in with T6o and an M of 2 even though he could wait 6 more hands before the blinds come and hope to pick up something better than ten high.

So is this a contradiction and Sklansky now admits that he is wrong or is there a way to interpret these two ideas so that both are right?