A "solution" I found in order to
exterminate / disable Iron Golems
This "fix" results in Iron Golems spawning for a quick moment, disappearing, and leaving items (iron, poppy) behind. However, works for me, even resulted in a surprisingly significant frame rate boost. Covers a very wide area, but multiple command blocks may be needed for huge maps.
287 Golems were nuked when I first ran the command below:
Plug into a repeating command block:
+ Run the command below, in chat:
/gamerule commandBlockOutput false
^Disables the notification every time the command block eliminates Iron Golems. Otherwise it was pinging my screen every few seconds.