Because a well-regulated National Guard and Reserve, and well-regulated Federal, state, and local public safety departments, are necessary to the security of our free states and our free nation, the rights of citizens, while serving in their capacity in the aforesaid organizations, to keep and bear arms shall not be infringed.
It's not much more than a measure of public opinion, but by making our opinion clear we can keep politicians on notice that efforts like this should go nowhere.
At least they are finally admitting that the 2nd Amendment as written does not refer to the National Guard, the National Reserve, or "public safety departments" (police).
At the time of this writing, the results are 11.5% to approve the proposed change, and 88.5% to reject the proposed change.
And that's with their incredibly tortured linguistic attempt to confuse poll takers.