They ALL can be made to fail.
I saw that fiasco on CBS last night too. No doubt it is the worst tragedy a family can be faced with, killing your own child. And I can understand the families desire to place the "blame" on an "Inanimate Object". Seems to be a virus infecting otherwise good folks coming from the Ultra-Liberal Radical-Leftists. Don't agree with it, but I do understand it.
But, here is the situation (not problem) as I see it.
I believe I can take ANY mechanical firing mechanism ever made and put a small piece of trash in the right spot inside it, simulate a bit of wear with a hone, break a specific piece, or adjust it "improperly" and make it fire anytime you move the Safety to "OFF".
Likewise, I believe I can do all the same things just a bit differently and you will never be able to fire the mechanism, under any circumstances short of tossing the firearm into a fire and letting the round cook-off.
No doubt in my mind at all, that this sort of a "situation" (legal defense, reliability issue) is what caused Ruger to go to non-adjustable triggers on their M77-IIs (or what ever they call them). I nearly bought one without realizing that back when they first came on the market. Thank goodness the Gun Shop owner knew me well enough to say, "I don't think "YOU" will like the fact it has a non-adjustable trigger!" He was correct, and I didn't buy.
Now, before anyone panicks, let me say that if you get a "good trigger" (clean breaking and no creep), then the non-adjustability would not "normally" be that big of a deal to most folks.
Just remember where the report is coming from, CBS. And expect the 2nd part to be "worse" tonight. Wouldn't surprise me to see CBS do a full 1-hour "News(?)" Special on them. Just one more slam against the Oldest firearm manufacturer in the USA.
A person can be killed by a bow and arrow if the bow is "loaded", then pointed at a person and the Sear (finger tips, release mechanism) slips, breaks or is improperly adjusted. Do they need to be re-designed?
Good hunting and clean 1-shot kills, Hot Core