My Crower rods were new in 1990... ran in a street strip car all those years. The Pankl rods ran 500 miles at 9,000 rpm. I would think that is pretty good evidence that unbushed rods work and these NASCAR engines run a dry sump without much oil flying around the sump.
I questioned this too... every machine shop and engine builder I spoke with said it's not an issue. New cars and most aftermarket rod today do not have squirt holes in the rods, either. A big nono for many years.