Earlier quoted context omitted.
It depends on your definition of the problem. The problem I would like to solve is ensuring that everyone perceives the market as fair, i.e., not tilted toward parties with access to privileged information.
This implies a truly bizarre understanding of markets and fairness. Was it fair when Enron was valued at $70B? Would the situation have been less fair had insider traders with more information pushed the prices down earlier? Insider trading doesn’t cost anybody anything, it simply allows for more accurate pricing which benefits everybody.
Insider trading has an institutional cost: it's corrosive to trust in the market. Retail investors are less likely to make optimal investment decisions if they think that insiders are lurking around every corner. That trust is further diminished if retail investors believe that insiders are not just investing based on insider information, but speculating on higher-order instruments.
It's perfectly fair to note that our current regulations against insider trading aren't ideal, and that the SEC only catches a tiny fraction of all insider trading. But the threat of enforcement does serve as an important root of trust in the market, and removing it is unlikely to serve individual investors well.