...I'm thinking that a retention holster might not be a bad idea, having myself become separated from my bike through no fault of my own. Luckily, I was wearing my carry gun concealed that day in a shoulder holster under my armored jacket, so my S&W Model 13 remained with me. (Yeah, I'm a gear guy - boots, helmet, armored jacket.)
It worked for you, and I'm glad. But that does not mean that everybody else must use a holster that uses more than friction to retain the handgun.
If we went down that road we'd end up with Retention Level XXXIV.cm just so those persons who seem to drop their gun out of their purse/jacket pocket in the public restrooms would not need to worry about the handgun "just going off" when it hit the floor.
If you find that a holster that uses only friction to hold/retain your handgun does not work for you, by all means go for something with additional retention features. But don't tell me what I need to do, OK?
stay safe.