I have not had a chance to read the proposed bill so I don't know how it is worded. My thoughts are as follows:
Homeowner's insurance includes both coverage to insure your home for an insured loss (fire, windstorm, hail, tornado, etc) as well as indemnity coverage to protect you if someone is injured on your property due to your negligence or you damage their property thru your negligence (examples: you are cutting a tree limb from one of your trees and it falls and strikes and damages your neighbor's car, someone visits your home and falls thru a rotten board on your porch,
your son accidentally throws a baseball thru teh neighbor's window.)
I have read most of the standard issue homeowners policies issued by major homeowners insurers (most of these are forms, for example the HO-2 form, with many different riders that may be attached either adding or excluding certain coverage -- for example riders specifically insuring your jewelry or artwork) -- the indemnity portions of these policies do not generally exclude negligent acts involving firearms --
so if I accidentally pepper a fellow hunter with birdshot while dove hunting, my homeowners would cover it as a negligent act. The majority of homeowners policies also have a medical payments provision providing for medical treatment of an injured person harmed by the HO's negligence (may be in amounts of $10,,000 to $100,000 on average). All liability policies (including indemnity provisions of HO policies) exclude coverage for intentional acts because it is against public policy (the Latin term is "contra bonos mores") to insure for wilful/intentional acts or torts. I believe the proposed bill is probably designed to make it mandatory that gunowners have indemnity coverage to provide coverage to a person injured by a negligent gun-related act -- and the truth is that most, if not all gunowners, are already provided that coverage by their existing homeowners coverage. So, as a practical matter, even if passed, it would probably not effect
homeowners as they most likely already have insurance that provides coverage (if they have a mortgage, their lender will require them to have homeowners coverage anyway, to protect the lender from loss of the home from an insured event or lawsuit). Renters often do not have renters insurance or any type of liability/indemnity coverage, so they are most likely to be impacted if they own a gun and the bill passes.
The incidence of negligent gun-related injury lawsuits is very low -- a homeowner is most likely to be sued because someone slipped and fell on their driveway or steps to their home, for example. I doubt the trial lawyers pushed for this because there are actually statistically few lawsuits filed for gun-related negligence vs slip and fall cases, etc -- it would seem to be part of the "feel-good" nonsense wrapped into these stupid "let's pass a new gun law" packages -- I think it is more based on "stupid" because the proponents of the bill probably do not realize that most gunowners are already protected by their homowners policies indemnity coverages than it is based on "sinister" -- some moronic legislative assistant to one of the bill's proponents probably came up with "let's make them spend money and buy insurance" without realizing that gunowners who own homes are most likely covered by their existing homeowners.
Personally, I carry a multi-million dollar umbrella (excess policy) on top of my $500,000 of indemnity coverage under my homeowners policy just to give me extra insulation from any negligent act based lawsuit --
my regular homeowners coverage covers me under the indemnity coverage for any negligent act (no exclusion for guns) and the umbrella extends that coverage to the excess policy limit -- and excess policies are relatively inexpensive in many jurisdictions.