How they act is the hyper focus on first to market. HFT wants to have the first buy or sell order at price X. Being first to market does not impact liquidity a

How they act is the hyper focus on first to market. HFT wants to have the first buy or sell order at price X. Being first to market does not impact liquidity availability. After all someone else has an order at that price already. My points about risk are beyond going long or short for a meaningful amount of time (certainly not seconds, probably not minutes) trading quickly isn't hugely impactful on end users. Thus all of the downsides of trading quickly aren't reducing risk for them.