In a poorly-run hierarchy, having a manager means playing along for someone else more powerful, playing along with their personal politic, etc. That can be very distracting and exhausting, because for less-adequate managers it involves a lot of mental effort. And, importantly, it feels very person-centred rather than craft- or value-centred.
Contrast that with freelance work: yes, clients can be very difficult to deal with, and in fact may require more "high touch" interaction. However, at that stage it is just a social contract, customer service, explicitly outlined interaction. And the relationship is transactional from the outset, there is a clear value focus. Plus, one could theoretically fire their client and move on (although that is not always realistic).
As another comparison, let's look at a trades job in a highly unionized company: it can actually be quite liberating, because promotion and career track are again detached from specific personal impressions and set to a highly regulated and enforced schedule. People feel empowered, because it is a shield of sorts (albeit one that comes with costs as well).