During my time flying Hueys in the US Army, we did EOL's day and night routinely.
Lots and lots of Day EOL's....literally hundreds of them.
Nights....not so many but lots.
We also practiced coping with Tail Rotor failures as well.
There was ample reason for ensuring a high level of proficiency in those skills.....as we were engaged in a War that guaranteed the need for such proficiency.
It paid off when it was needed and greatly reduced the casualty rate from such incidents.
In Peace Time....the cost/risk considerations skew the decision towards not doing as many and then only in very controlled circumstances.