I tend to search the brandname if I'm not sure about what the domain is. There's quite a few Dutch brands that are either on .nl or .com. Or their brand is already in use by another company, so they've got some extra text in theirs. Or their name has a & in it and they might use "n" "en" or "and" in their actual domain.

Google doesn't like you using the term "google <something>" because that opens the door towards a genericized trademark (like xerox or cellophane), but plenty of advertisers buy keywords or a phrase on Google and then use terms like "search for <keyword or phrase> to find out more" in their radio/TV/outdoor ads.

I'm not sure if it's entirely laziness. Unless given a URI through some other medium, you can't expect to find a business by simply appending .com, .org, .net. there are only so many viable names in this structure and collisions are inevitable.

At one time, there were less organizations online but now, almost every single business, large or small, has a web presence over viable domain name scarcity.

As such, discovery service online is a necessity. Google and other search engines fill that void. Now should they completely replace domains? Probably not, at least not yet, but some other addressing scheme needs to exist if we want to be less reliant on services like Google. Personally, I just use other search engines. If I'm not finding results I fall back to Google.