Do you think it could be a combination of things? Like, in order to avoid burnout you need some degree of meaning but also some degree of success and positive work environment.
I'm coming at this from the perspective that I've been struggling with a lot of burn out and I'm mostly proud of who I am and what I do but I'm stressed because I constantly have to compensate for society's failure to reward people's contributions.
That could just be me though. I definitely agree that I think that meaning and purpose is a big thing that people are missing now.