That's not false - capitalism is justified by it's proponents by it's ability to serve the public better than socialism (the majority of the public wants more socialism - entitlements/public services etc). Some aspects of capitalism (copyrights, patents, HFT, pollution) are not serving the public and there are valid arguments from the opposing side.

My goal is to trade daily/weekly (in addition to monthly/yearly). I don't want to seconds/minutes/hours (and so can't many others - so the "competitiveness" of markets is actually reduced).

Ultimately, stock markets exist to raise funds for projects (exits for entrepreneurs, financing projects in large corps) - they occur on the daily-years timeframe, not seconds/minutes/hours.