Also, Amazon did not start out being anything like what it is today. For years it was just books. I remember as they added departments, they would tack an extra tab onto the homepage--"CDs", "Video", etc. So what was Sears going to do? Instantly transport the entirety of a dying catalog business to a non-existing consumer Internet? That wouldn't parallel Amazon at all. Not to mention that Sears did not have access to a bunch of giddy investors who were willing to pump in money despite no sign of profitability.
Only under a superficial analysis could Sears have been what Amazon is today.