This didn't work with early LCDs; areas near cursor literally stayed blank for couple fractions of seconds. Wiggling would only make it worse, and negative space created could not be spotted either because UI was mostly blank in the first place(dark or light).
I make the pointer bigger on both macOS and Windows. Unfortunately, at least on macOS, it becomes too imprecise for clicking if you max out the size, but I can't deal with hunting and pecking for my pointer so I do push it as far as I can.
Probably stems from the days of using computers with much lower resolutions where the mouse pointer was therefore relatively large and easy to find. My Amiga 500 typically ran at either 320 x 256 or 640 x 256 (with rectangular pixels), but the mouse pointer was a 16 x 16 hardware sprite, which locked to the lower resolution IIRC, so it was always 5% of the width of the screen, and 6.25% of the height. This is absolutely enormous by today's standards, even with the mouse cursor enlarged to, not its maximum size on macOS, but its maximum useful size.
Interesting. And by now every platform has enough information to define the mouse pointer size in physical units rather than pixels.
If anyone at Apple is listening, highlighting the screen where the pointer is (dimming the others) or just having the option of resetting the position to a known place, would work just fine.