It's true that pretty much every job has a routine element to it. Unless you're an industry-leading researcher, a designer or something else which actually involves making brand new things from scratch, there will be some form of protocol you'll be following in your working activities. There aren't thousands of ways how to make a dental filling, how to arrange a property sale or how to build court defence in a case of domestic abuse. It's all been done multiple times way before our day and we're unlikely to completely reinvent any process. The same goes for flying. So, I don't think that it's intrinsically a boring occupation just because it's quite procedural. Most jobs are in one way or another.