Being an Avid editor makes you a better editor. To work in Avid you need to be precise with what edits you want to make and where. I find that versus Premiere or formerly Final Cut 7, the dragging and dropping in the timeline can sometimes lead to happy accidents, but normally just makes editing clunkier.
Avid has very confusing error messages. Versus something like Premiere that tells you exactly what your problem is, Avid will raise an error such as "SYS -5000" and you just need to know from experience or web searches what this means and how to fix it. I also dislike some of the effects, and find them to be somewhat user unfriendly. The effects are also named strangely, and I find it weird that opacity is called "foreground," for example.
Watch tutorials for the best way to 3 point edit, and how to use their effects. The effects are not intuitive and require training whether you are learning from someone else are watching tutorials on Youtube.
Our entire business relies on Avid. We are commercial editors, so we craft stories out of sometimes 30+ hours of footage into either short 15 second commercials to sometimes longer form web videos of 5 minutes or more. Being knowledgeable in Avid is crucial to working in the film editing industry. Being an assistant, I work one on one with my editor constantly. The seamless project sharing/bin lock system is vital to our workflow and allows me to stay on top of what my editor is doing.