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.