I don't think it's bad, in fact I wonder the same. These are my colleagues because it's the same path I took - I now work developing self-driving cars (I slowly transitioned from aerospace to manufacturing automation to robotics) and it's the most rewarding job I've ever had, and it feels very much like engineering. I don't care if I'm not a "manufacturing engineer" anymore; I really like my job and I like my title to reflect somewhat accurately what I do, but that's the extent I care about it.