To start off with some pragmatic comments about Chrome. It can be a bit of a memory hog, and definitely uses more power than Safari, but unless you're trying to eke every last bit of power out of your battery, it really isn't important.
I use Safari because all my bookmarks / recently visited pages / passwords etc., are synced across all my devices (iMac, MacBook, iPad, iPhone).
I could use a Google account to do the same with Chrome which would offer the further benefit of helping Google snoop on everything I do. It might make my targeted ads more reliable too which brings this back on topic. Every cloud...
Don't forget that Chrome ignores your system wide DNS settings and -always- makes sneaky requests to Google's DNS servers. And even if you block 22.214.171.124 and 126.96.36.199 on your firewall, it tries using myriad other addresses as well. But if you're cool with that, that's also fine!
I mean, on that basis you could argue that it's virtually malware.
Have to say I'm yet to see a compelling argument for using anything other than Safari on Apple devices.