Why did ICC not ban Virat Kohli after his ‘physical contact’ with Sam Konstas?

The ICC fined Virat Kohli and gave him 1 demerit point for shoulder-barging Australia's Sam Konstas in Melbourne Test. Kohli escaped a ban as ICC deemed Kohli's offence to be Level 1 of ICC Code of Conduct after looking into the context of the incident and force of contact. Earlier, Konstas stated that he thinks Kohli accidentally bumped into him.