There is nothing nonsensical about Rugers being stronger than S&Ws. It approaches being a fact of life.
Read the thread from the beginning. You will discover about Ruger that:
It employs offset cylinder cuts.
Has a solid frame as opposed to a sideplate.
Uses no screws at any critical stress points.
Is arguably overbuilt, even for being a "mere" casting.
Is used as a work-up platform for serious large bore revolvers.
Even the GP-100 has a conversion package available to take it up to .44 Special, something I have never even seen anyone suggest doing to an L-Frame Smith.
Clement's Custom will make you a 5 shot .44 Special GP price on request.
So, again, I think you will find that most Ruger shooters will concede that out of the box a Smith has more refinement in it. What I find curious is that the Smith shooters will not concede that a GP-100 is tougher than an L-Frame.
I think it is because a Ruger can be refined to a very great degree, but there is precious little that can be done to get a stronger Smith .357 Magnum, shy of finding a used N-Frame.