Nigeria, Oct. 31 -- Last August, I visited home. Like millions of travelers around the world, I had to book a flight, and I turned to Kayak, the online travel search engine that helps users compare prices for flights, hotels, rental cars, and vacation packages. I entered my travel details, and within seconds, the website spat out multiple itineraries, complete with airlines, departure times, and prices. I compared the options, weighed the costs, selected a flight, entered my credit card information, and completed the purchase.

It was a relatively straightforward process. The problem, however, was that I still had to do the searching, comparing, deciding, and booking, all of which tech bros believe takes too much time for such a simple ta...