Google's secondary search, for or against?

In the article "Some Retailers Oppose Google’s Secondary Search Feature" in Techcrunch, some people do not agree and support Google's secondary search. In my opinion, I also think that this feature is not that useful and helpful.

Google offers its secondary search feature by clicking the "I'm Feeling Lucky" button. When people search the keywords by clicking this button instead of the "search" button, Google will directly link you to the web page of the first result of normal search. For example, if you search "ebay" from the normal search, the official website of ebay will come up in the first searching result. If you search "ebay" by clicking the "I'm Feeling Lucky" button, it will link you to the first searching result of the normal search, which is the official website of ebay.

However, I do not think that this feature would be very useful. It is because people must know the first searching result of the normal search before using the secondary search feature. If they do not know or predict what result will come up at the first, then the secondary search feature is totally helpless.

Moreover, people will confuse with the "I'm Feeling Lucky" button. When I had not known much about the function of this button in the past, I thought that this button is used to bring users to the official website of the searching keywords, such as seaching Toyota then go to www.toyota.com, searching dmv then go to www.dmv.ca.gov, etc. However, I misunderstand the function of Google's secondary search.