I never said that Google was happy about doing a Chrome "shell" on iOS, just that they did it. Which gives them more exposure than if they didn't release it, especially if they're able to do a decent approximation of Chrome's features and UI on iOS (probably
similar to the Android version.) Mind you, since I avoid Chrome, I really can't say whether the feature set carries over. I don't even have it on my Android tablet.
Seems to me that by not releasing RT/8 versions of the apps even in wrapper form, they're reducing their exposure. Maybe not by much, as there aren't a huge number of RT devices out there for them to expose themselves on, but every little bit helps.
Your assessment is probably the most fair one - neither side is blameless.
And I prefer Kre-O over Lego or Megabloks. Just like I prefer Firefox over IE or Chrome. :-)