I was reading your answers and thinking about it. I have concluded that, although there are particular exceptions and motivations, in most cases the reason for this "strategy" is the same: that it is easier. It is easier to put all the chips in the center and let the opponents make the decisions than having to see a flop and act on it. It is easier to leave it "at random" than to personal ability. Who has not felt exhausted after a long tournament and has preferred to win a small pot preflop than having to face a multitude of difficult decisions? Obviously it is not a "strategy" that in the long run is profitable. But I think those people who play that way are not expecting profitability in the long run, if not immediately. Sooner or later, if you want to keep playing, you have to learn that poker requires patience, effort and perseverance.