No, insider trading does not mean “non-public information not available to other shareholders”, at least not in the US. It has to be information generated internally that was meant to be kept confidential.

There are many funds that base their entire existence on doing private research about companies and making trading decisions on this non-public research.

Visceral example: you spot a CEO get fatally run over by a car. You can immediately bet against the company via short selling, options, etc. even though the knowledge of his/her death is definitely non-public at that time.