I tend to disagree with this. If most day traders already lose, then it stands to reason that most of the profits must come from this group. If you eliminate the source of revenue for the few successful traders/entities out there, then they will actually only be hurting themselves.
I'm not saying that patterns won't change, but for this you have to adapt, just like on higher volatility days where the swings are greats, stops might also have to be wider.
If trading got to the point where a human cannot trade and they just packed up and left, the incredibly fast and efficient computers would blow up trying to just out do themselves for very little profit indeed! Right now, they are exploiting human nature, and if this human nature is removed, there is nothing to exploit. You can say that programmed systems still include human nature, which is true, but those quants who programs these things aren't programming with their emotions. So if all you ever had was quants against quants, I think the potential to extract profits from the markets is greatly dimished.
In other words... careful what you wish for! If the markets ever got so unpredictable because of crazy algo trading in order to extract more profits, I believe they won't get the desired effect.