Sorry about your friend, I knew someone who went through something similar and it's awful. To rephrase, mental illnesses are very real and horrible. Seek the right resources when you encounter such issues.
I just want people to avoid reading articles on burnout from the internet and thinking it immediately applies to you. Trivializing and attributing burnout with hard, driven work is equally harmful, in my opinion, because burnout is just as much a larger combination of other factors. Worse, one could easily overlook actual mental issues present in their lives because the internet tells you its burnout.
