Basically, he says most of the worst players are going to go out in the first few levels. That's the prime time to start building your stack. It's a ton easier to turn 1500 into 5-6k against a bunch of fish than it is against the tighter players that you'll face later in the tournament, and that's normally enough to have a very decent position coming into the bubble period, depending on ammount of entrants of course.
There's a ton of dead money in these tournaments, I would rather take it from the fish than try to take it from the solid players.
Again, these are just more or less my thoughts, not trying to rile anyone.
