I don't get the arguments against it: 1. Google is paying Apple, which is good for Apple and 2. Google is still the best search engine, even with Bing's recent improvements
I remember when, before Yahoo! went under, Marissa Meyer sent a whole team to Apple to work out a deal to make Yahoo! the default search engine (at the time, Yahoo! was powered by Bing) and Apple shut them down, leaving the meeting unimpressed.
It would have been a huge coupe for Yahoo! and would have saved the company, along with Marissa's legacy, post Tumblr acquisition.