The standard response to claiming HFT as a market maker is that it provides minute amounts of additional liquidity and its costs and drawbacks, or potential costs and drawbacks, outweigh the benefits. Of course some amount of market making is necessary, but you could claim that without HFT you'd just settle your trades in 0.1 s rather than 0.02 s and with 0.5% spread rather than 0.49% spread.

I don't know enough to form a proper opinion whether or not this is the case.

Of course part of the problem is defining HFT or algorithmic trading. If you build a robot to press an appropriate button at a trading terminal really fast, is that algorithmic, HFT, and should that be banned? Do you fix the tax at 10 cents, and if so how do you react if companies just create massive securities worth millions of dollars and trade those?