Well, the entire stock market is a world of thievery. Are you saying do not invest in any stocks and let your money rot in a savings account due to inflation?
What thievery happens in the stock market?
HFT is nothing short of skimming off the top at scale.
It's still not thievery by any definition of the word.
You don't have to argue the opposite of a prediction to disbelieve sources with poor track records.