I fish from a kayak (not often enough, believe me). It's handy to be able to attach a lanyard from my belt to my P07. Hopefully I won't fall off (sit on top fishing kayak) and my P07 won't work it's way out of the holster, but if either happens I can grab the lanyard and pull the pistol back to me rather than cry over a lost P07 and RMR.
I don't ride the ATVs anymore (my ATV riding buddies are mostly gone now, just a couple of them left on this side of the dirt) but this is another activity where a lanyard would be useful.
You know, back in the early days of the 1911, even the magazines had lanyard loops on them. At that time the US Army still had horse mounted (cavalry) troops and the lanyards were seen as a necessary thing.
With the extended magazine bases on the pistols I usually carry the lanyard loop is well below (above??) the base of the magazine anyway and never comes in contact with my hand/fingers.