In defense of Ruger's lock:
They first put it in a series of guns unlikely to be pressed into defensive service (outside of a few nuts like me!): the single actions.
They left it there for five-plus years while the CAS/SASS players shot the snot out of 'em with ZERO malfunctions or accidental engagements.
Only then did they put the exact same lock design into defensive guns, starting with the LCRs. And a couple of years have gone by and STILL no failure reports - at all.
If that wasn't enough, the locks are invisible unless you want to drill a hole in the grips to expose them.
I think Ruger's lock program has been a superb example of how to do it right.
My daily-carry-without-fail New Vaquero in 357 is a 2005-era vintage piece and still has the lock. It has caused me no trouble or concern, and I started packing it daily only after a few years of zero failure had been tracked.