This seems reasonable to me. JavaScript is being used everywhere and most people are okay with it. As a business decision I don’t see why Google would support such a small edge case. That being said, if they feel like explaing why they should maybe try a little harder. I assume most people with JavaScript turned off might appreciate more details so they can decide how to respond to the requirement. Then again, their current approach actually seems reasonable to me.
Thus only 0.1% of users know what javascript is and it's okay with it. That is an interesting random stats, seems pretty realistic. I at least liked it.
Then if we take this 0.2% as representative (and 6 million out of three billion users probably is), it would be fair to say that this 50% split would scale if more people learned about javascript.
Google will be in hot water if humanity ever decides to take on javascript.. assuming the source for those states aren't someone's ass.