The man or woman just finds him or herself in a precarious situation and needs to be armed. Now has to jump through 3 more hoops and his first second and third choice was banned and a shortage of suitable arms are on back order. Jump the hoop[s, pass the background check, find a suitable gun and the day before they get it tragedy strikes. The bad guy gets a murder to his credit, gun control gets another victim to its credit.
Good intentions will always be pleaded for any assumption of power. The Constitution was made to guard the people against the dangers of good intentions. There are men in all ages who mean to govern will, but they mean to govern. They promise to be good masters, but they mean to be masters.