Ok first off, I'll explain that I own five spring assisted knives, all happen to be Kershaws, first are the pair of #3840x "Freefall" knives, that are EDC companions, a recently acquired #1885 "Entropy" which due to it's combination of smaller "flipper" and narrower blade places that flipper closer to the pivot, reducing leverage. is admittedly harder to close (AND open!) than my "freefall".
Next, I'll explain that I've had a stroke, that mainly affected my overall strength and fine motor control. mostly with my right side and frankly I have no issues opening either my AO-knives or either of my ball bearing flippers or closing them for that matter...
To be blunt closing an AO-knife one handed is NOTHING compared to de-cocking a 1911-A1 one handed. It took me most of a day after I was released from the hospital before I was confident enough, to do it with live ammo in the pistol. (mostly this is a mechanical thing you do mainly to PROVE to yourself that you can, because as anyone familiar with the 1911 knows you usually carry it "cocked & locked" (a round chambered and the safety applied) which incidentally is required in my holster, as the retention strap goes around the rear of the slide and it will not do so with the hammer down.
As for impressing anyone with my spring assisted flippers? As I am 57 years old does anyone really think I give a damn?
The things I am most likely to need to suddenly cut are a length of heater hose or an inconvient cable zip tie and when these events crop up my free hand is not available... Occasionally, I'll find a bag of chips that refuse to be pulled apart so I'll cut the bag.