Just picking up something about the comments on Edward and Sophie's work ...
I have a close family member who has a ceremonial role that involves representing a civic institution at a lot of events: everything from parties for children in care to church services to charity functions to opening a new wing of a SEN school or a new local exhibition.
And I have to say, imo, it's exhausting work that operates, fundamentally, as a small-scale diplomatic enterprise between the public and the institution. It's necessary, it's important, but it's not personally fulfilling at all because you are not actually doing anything "real."
The nearest equivalent would be that it is like going to a formal wedding every day, except you can't get pissed, you don't know anyone, you have to look immaculate, and you have to talk to everybody, smile constantly and say pleasant things to people that assure them you think they are fascinating. And then you usually have to give a speech that is both good humoured and doesn't offend anyone.
I've done a number of them in the past, and, believe me, it's not the jolly it looks. I once sat in a freezing cold church for three hours on a hard pew while listening to a presentation on evangelical music of the 1950s. By the end, I was so drained by the experience that I just went home and went to bed.
The only thing you get out of it personally as an individual is the exposure, but if you have no need for that because, say, you have no desire to go into politics or you are a member of the Royal Family, it can be a special kind of torment.
So I'm really not surprised if Megan has realised that she just doesn't want that life. I wouldn't want it, even if I was guaranteed all media coverage would be positive. You are basically spending your days as a bystander to the important events in other people's lives without actually being involved in any real way.
And I do have to say ... I don't think you realise how hard it is to have this kind of role until you find yourself in it and experience the reality of what it is actually like.