Why not the Europeans changing to drive on the left instead
The cost would be huge, a massive change in the road infrastucture would be required, not just signage but 'hard build' as well. Initially the bulk of cars would remain with driving wheels on the right. Then there would be a massive re-education of drivers needed.
In the transition there would very likely be more accidents caused by this than you would get in 20 years from 'blind side' accidents now.
It would be a pointless and expensive madness.