Okay, so on what do you base your belief of HFT, Uber and "traditional capitalism"? I have to assume that information inferred from data.
HFT is the easiest, it provides liquidity, helps to keep spreads narrow, flash crashes are nasty, but so rare there have been only 2 (and the cost of those was minimal, a few failed margin calls, oh noes).
Uber is tricky, because it's run by assholes, but that's not really different from the taxi (cab) industry in most cities. Plus they skirt the law, which was largely instituted to protect the interests of the incumbent taxi companies. It arguably helps to make the taxi market healthier, thanks to its increased efficiency, lower prices (larger supply), which leads to a bigger overall market, which likely leads to better relative wage for drivers. The potential negative externality happens when demand dries up, drivers are forced out of the market pretty fast, due to the more efficient pricing they must apply (or lose market share). And of course, Uber has competition Lyft (in the US) and Wundercar (in Europe) comes to mind.
And on traditional capitalism, the simple truth is that it's inescapable. People are locally rational, they have limited information, and oftentimes they have utility function that are non-optimal even locally, but they are rational nonetheless, and again, people are price sensitive. So capitalism is just the machine of progress that seeks more efficient allocation of capital. And even if you do away with property ownership (and try to opt for a temporary property possession model) you'll find that other types of capital still remain, they just get more perversely important (human capital, who knows who's who, influence, reputation, use of force, and so on).
And you can see that for these inferences you need evidence, but these are not single instance based cases like the Sony hack. It's much more sound and safe to trust and act upon these aggregates, than upon a single FBI "post" and the resulting drama.