Hi, I hope I can explain this so it makes sense! And I really hope I cause no offence, I'm very passionate about FFA but appreciate very much that people have hugely differing experiences, this is just mine - hopefully you will get a few different perspectives.
We understood FFA to be the best thing for, in our case, newborn babies. And as parents we knew we would do absolutely anything for our children, we would die for them. So, for us, FFA was simply "doing absolutely anything for our children if it was the best for them, no matter the pain to us as parents", it's just we were doing it before we really knew or loved them! It was a leap of faith!
Now, years on, I'm SO glad we did it, we have two that stayed with us, and one that didn't. We dont regret a second of it, we love our children more than anything. FFA means you take on the pain/risk so your child doesn't - once you love them, you can't imagine not doing it. It's just FFA asks you to do it before you love them!
But it is hard. Being referred to as the foster parent, seeing them leave for contact with birth family, the endless uncertainty. It is hard and you have to develop coping mechanisms. But the opportunity to care for your child from a very young age, and reduce the traumatic foster care changes is, in our opinion, so worth it.
I used to just eat a lot when they were in family contact time to stop my anxiety 🙃 and you do learn to live with the uncertainty, it becomes like background noise. When our second child went back to birth family it was excruciating, and very dark, for a while. But we still went back and did it again because we believe so strongly in how good it is for the child.
There is a lovely book called Fostering For Adoption by Alice Hill that you might find useful.
Anyway I hope my ramble is in some small way helpful - even if you completely disagree!! 🙂