So are you in favor of getting rid of the cannon on attack helicopters as well? Since the chance of them getting hit my a manpad must even be higher
I do not think that you have any concept of usage of a machine gun / cannon against slow moving flying targets by a fast flying jet---.
Onceyou learn and understand that concept---it will make things easy to understand---.
A helicopter is a slow moving machine designed to target slow moving targets or static targets with a cannon / machine gun---.
For a particular reason---I requested for someone to give 1 example where a modern fighter aircraft has gone guns on guns with another fighter aircraft for the last 30-40 years---.
As for helicopter---rarely you will see one with air to air missiles---. They all have their guns as their primary fighting weapon---so to ask to remove that primary weapon sound more silly than serious---.