Because, you know, imposing what amounts to a poll tax on law-abiding firearm owners is way more effective at reducing preventable accidents than educating people about gun safety. 
It's got little, if any chance of making it out of committee, but knowing is half the battle as they say.
House bill would require gun owners to have liability insurance | TheHill
Firearm Risk Protection Act of 2015 (H.R. 2546) - GovTrack.us

It's got little, if any chance of making it out of committee, but knowing is half the battle as they say.
House bill would require gun owners to have liability insurance | TheHill
Firearm Risk Protection Act of 2015 (H.R. 2546) - GovTrack.us