If Ruger says it is Ok for the LCR then it is OK for the LCR.
I would not make a habit of it because many older guns can have brittle firing pins that will break from dry firing.
That is the better answer, best not get in the habit of dry firing arms.
People that I have known a long time that do it, eventually will do it to one they shouldn’t have. As it happens, it tends to be a new weapon or a friends that they damage.
It is kind of like the difference between a mfg rule and the shooters bible.
For example:
Mfg: Never point a loaded fire arm at another person
Shooters Bible: Always treat a fire arm as loaded
Technically or what is good practice.....that is what you need to know.