Agreed - I experienced burnout in a previous job and it literally damaged every aspect of my life to the point where my friends were begging me to quit my job because they could see it physically and mentally destroying me.
I was barely sleeping, I ate way less because I didn't feel like I had the time or energy, I cried about work most days of the week, I shut myself off from my friends because I was so exhausted all the time and because I felt like I must've been awful to be around because I was so consumed by my work stuff, I got ill all the time and would force myself to work through it which meant it would take me way longer to recover... I could go on, but that's depressing enough, I think.
I'm in a much better place now and in a job that doesn't overwork me, but when I was going through that I definitely didn't have the time, energy or money to book holidays and post on Instagram about my daily routine, I was basically a shell of a person. I know most people portray a better version of their life on social media, but I think she's confusing burnout with everyday stress, which literally everyone deals with in their job.