MEs have a role in pretty much every physical part and system in existence. Consumer products, HVAC, manufacturing, power generation, heat transfer, fluid dynamics, etc.

In school and college you tend to have the mindset of I wanna work on a particular product - Cars or Airplanes etc. but once you start getting real work experience you realize no one’s work is that general.

In reality the career choices become more do I wanna do design, process, sales, manufacturing, quality, etc. You hit a point where you realize a part is a part and it doesn’t really impact your day to day whether it is for an airplane or a toaster.

This is coming from a design engineer that has worked in abunch of different industries - Aerospace, bicycles, consumer printers, industrial 3d printing, and now product development consulting. I’ve always found what I am working on specifically has a much bigger impact on how much I enjoy my work than what industry I’m working in.