Lived in Australia for years (an amazing country) and spent a lot of time driving a friends RHD BJ40 here in the PNW. Don't really care for RHD in the US, but it's not like it's hard to manage or even "unsafe". It's bad drivers that make nearly all driving "unsafe" and nearly all of them are driving on the left side of the car so... Being in an RHD car just makes it slightly tougher to see the morons coming in some situations.
As for getting used to RHD... took me all of 5 minutes. Worst part for me was all our LC's had CB's in them mounted so that when you shifted to 3rd gear you smashed your knuckles on the Mic. plug. Otherwise it's the exact same as driving LHD except you shift with your left hand. Everything else (control wise) is the same, and actually the hardest part muscle memory wise is wanting to pull down and towards myself to hit 2nd at a quick pace. Sure it's a bit strange for a min, but... not that big a deal IMO.
Considering the sheer number of truly amazing vehicles that were only ever produced in RHD, if you're a real piston head and lover of special automotive things, RHD just comes with the territory.