To so many people buying guns, besides the temporary hyper inflation of prices and lack of availability...
One of those is the rash of first time buyers. A lot of people went looking for the black guns before the ban, and found them sold out, so they got something else instead. So we now have a lot of people with guns, who never owned one before.
Likely all they know about guns is what they have seen on tv.
How many of those are going to read the instruction manual?
How many are going to get ANY safety training? etc.,etc.,etc...
Some of those people ARE going to have accidents. Some of those accidents ARE going to be fatal for someone. And then there is the whole list of possible misuses that untrained people are going to get into. I doubt many of the first time buyers even have a clue when it is legal to shoot to defend themselves, and when is isn't. That's going to be a problem, too.
Most of the people who are new gun owners aren't going to be a problem. Some of them may even become enthusiasts, with time. But some of them are going to be idiots, who now have a gun....