Sure you need to get your foot in the door, but if you don't utilize the connections you've made throughout your working history, you either A) weren't useful enough to build higher standing connections, or B) were probably too focused on being a good employee on a technical level.
Pro-tip: Companies love hiring people they already know through some mutual relation. I would argue that a cold-interview process is directly the result of a lack of trusted upper-management network contacts.
It's very common to skip these bullshit interviews through this path. When you ask yourself "how did this manager get there?" this is probably your answer - they knew how to play the game better than you did.