The original poster needs to find a new club to hang around. 3% failure rate on gun safeties is ridiculously high. I've been hanging around gun clubs, the farm, hunt camps, and ranges regularly for about 35 years. I shoot 15 thousand + rounds a year. It would be an exceptional day that I don't handle a gun for one reason or another. I can recall only a couple of instances of malfunctioning safeties.
Hi Slugo, since I adjust telescopes during hunting season, I see a LOT of rifles. In every case where the safety was not working, it was on older, beatup, improperly maintained rifles. We see them later in the season, when deer season is about to start.
On top of these safety problems, I refuse to adjust 3 to 5 rifles per year. These are rusted, broken stocks (or tapped with duct tape!), bases that hold only by 1 screw, ... I do a fairly complete mechanical review before I even take 1 shot. The most common problems I see, in order of frequency are: broken scope (mainly old Bushnells), loose scope rings, loose action in the stock, rust and general lack of maintenance, broken safeties, headspace issues.
The weirdest I saw was a guy who welded his scope to the base using some metal wire. Needless to say, I did NOT put my face close to that scope!
But I also get to shoot wild, exotic and super expensive rifles that I would not have a chance to shoot otherwise. And the majority (90%) are just fine to shoot safely.
It is win-win. They get a properly zeroed scope, I get to shoot their ammo

and make a bit of money in the process

But I have to be careful...