Sometimes being seen as deeply knowledgeable will do nothing but create endless unpaid work for you. It is often the case that this work comes from people who don't know and don't want to know whatever it is you're good at.

Surely everyone here can relate with the classic "computer guy" everyone takes advantage of. It turns out this exact same thing can happen in actual technology companies. All you have to do to become "that guy" is have knowledge about some vital technology that people don't actually want to care about. People will happily send anything related to it directly your way, increasing your workload and responsibilities with zero additional compensation.

It seems databases are to many professionals what computers are to laymen. They depend on this technology but they don't fully understand how it works or how to fix problems. They still want to define the database schema and make other key decisions. If there's any problem, they don't want the responsibility, they want to be able to offload it to some "database guy". Who wants to be that guy?