I'd argue there's no right or wrong at all when it comes to this. There's only bigger and smaller, stronger and weaker, early and late. We draw an arbitrary line somewhere and say that people on one side cannot trade on information they have and the people on the other side can. And we trust that the people on the former side will never try to find a cheat or workaround.

The market is completely made up. It's driven by inequality in access to information. You're only going to make money if you're:

A. Lucky

B. Ahead of the game in some shape or form