Gas can be dangerous of course , but considering how widely used it is in so many homes and businesses , it is really quite safe at that.Always said I will never have gas in this house. Grew up with it but I have never seen a wood pile or stack of pellets explode and level a house.
I do recall a family who was blown up in their home (nearby town) about 30 yrs ago due to a gas explosion but the likelihood of that happening is likely to be one in a million.