Companies too invested in tech tend to spend themselves into bankruptcy. Companies not invested enough in tech tend to be overcome by companies with better tech more slowly.
1. The person who said it may be fancying his own role as tech-heavy and might relate to his/her imagination of what tech-pure companies do. Saying, we are like Google, appeases the person saying it, and satisfies their ego.
2. Often candidates like listening to this. It may not have worked for you, but for the candidates who like hearing this, this works wonderfully. If I were to wager, this line works for more candidates than it pisses off.
While I can see why you find it grating, I think I would forgive them. Whatever else they are, interviews are also those awkward social moments when new acquaintances are just trying to push beyond small talk while trying to please each other. At this stage, it's normal for people to try a little too hard.
Interviews aren't really like a casual social interaction. Progressing past the initial phone call typically involves spending from several hours up to to a whole weekend on some cute homework project, shirking on one's current job for more phone calls, burning PTO for on-site interviews and whatnot. I've got precious little time I'm willing to spend on that sort of stuff, so it's in my interest to be supremely petty.
It's an instant turn-off for me when I hear something like that. These are companies that should be thinking of tech as a means to an end, and not an end in an of itself. Even when I worked at a major software vendor, the tech was still just a means to an end.