Exactly. I've been a C, C++, and java developer for the past 12 years and never used Big-O for anything other than a shibboleth to get past the door. A couple places practically used C++ itself as a gatekeeper: they want people who are smart enough to program in C++ and survive it's rigorous interview process, but their main product is filling out forms and routing documents through a document management system.
I did have to do one algorithm type interview in 1999, but the company was actually writing cross platform (Windows console, Unix, and MVS) C code where we had to implement everything from scratch, so it made sense. But unless you're Google, Facebook, Netflix, etc. where you have to solve problems at a scale that no one has had to solve before, most of the algorithm style questions are meaningless in your day to day work.