There may be some extremely rare instances of material failure or defect that result in an accidental discharge. Even in those cases, there may be negligence if it was not detected during normal routine maintenance and inspection. But such situations are truly very rare, and even when they do occur, other safe firearm handling practices will still generally preclude injury.
Apart from that, I agree completely. The overwhelming majority of firearm, "accidents," aren't accidents at all, and if you backtrack on the sequence of events leading up to the, "accident," you will almost invariably find more than two or three instances of incompetence, inexperience or ignorance that would otherwise have preempted the, "accident."
....I did a little bit of research on accidental discharges...the following clip is from a Los Angeles Times article going back to 2015....again, just posting if for info, since some years ago, there WERE some instance of Glock handguns and accidental [sic] discharges...I own a Glock 17 Gen 3 and love it...!! AGAIN, these instances go back a number of years ago... (As Pilate said, what is truth...??)
“Glock uses the marketing term “Safe Action” to describe its firing-pin system, but the truth is that Glocks are accident-prone. They contributed to more than 120 accidental discharges in the Washington Metropolitan Police Department from 1988 to 1998. Anecdotes of increased accidental shootings have followed the pistol for more than 30 years wherever it has been adopted by police officers and citizens alike.”