That's not true in any way, shape, or form. Maybe it's true for you, but don't assume it's true for others or for the the rest of the world.

When I book a flight ticket, I go to the airline directly, which is true for more or less all people I know. For me this will typically be KLM, AirFrance, or SAS. These companies are Dutch, French, and Swedish.

There are no "500 silicon valley engineers" between me and them.

The world is bigger than your little world. I didn't even know what Expedia was until I looked it up.