The question, from a society-design point of view, is whether it is useful to have a whole class of people who engage in what is ultimately a zero-sum game and therefore an arms race, and whether it wouldn't be better to design markets in such a way that a large buy order can be placed without having to be an expert at HFT.

After all, the market is supposed to be useful for organizing long-term investments. The short-term stuff is pretty far removed from the progress of society.