That is a strange question. More and more problems are being solved by simulation (structural, fluid, thermal, etc.) Why would ANSYS not be useful in a career? Why would learning any one of many pre-processors for NASTRAN not be useful in a career?
In my opinion, learning any FEA software can be beneficial for your overall knowledge. In general, most aircraft companies use Nastran for linear analysis and Abaqus for non-linear analysis. As such, if I had a choice, I would learn Nastran or Abaqus.
Right now Edx is running a course /// CornellX:ENGR2000X:A Hands-on Introduction to Engineering Simulations///. Good one. You can audit the full course for free. ANSYS student license provided.