It isn't about getting ready of the whacky.. It's about getting rid of the stale. Japanese themes don't worry us at all. That's all superficial and as he said the superficial changes (blue eyed, blonde haired characters, Western themes) did bugger all.
When it comes to RPGs (as an example genre), Western gamers lap up the open world games such as Morrowind and Oblivion. The Japanese probably love these games as well, but the developers are stuck in the rut of crafting Street Fighter, Tekken and DOA games with the same formula over and over again.
Final Fantasy is still basically the same formula as well, with a bit of experimentation to do with class changing now and then.
I'm not saying that there aren't plenty of Western developers aren't stuck in the same rut and there are certainly fun, novel games that come out of Japan (like Katamari). Just my $0.05