Everything is in our hands. If bad-informed, biased people vote, why informed people don't?
In WA State officially about 600,000 people have concealed pistol licenses, with projected number of gun owners - 1,800,000.
The number of registered voters is 3,973,623.
In 2014 when the previous gun control initiative passed - 1,239,728 voted in favor, while 851,666 voted against.
If we make a speculation that everyone who voted for gun control was not gun owner and everyone who voted against was gun owner - then 57% of non gun owners voted vs 47% of gun owners.
If more pro gun people participated - the results could be different.