I would only call it fat acceptance if I were still dissecting parts of myself. I am not the sum of my parts.
For me, learning to look on a person's heart (including my own) has helped me to accept the physical differences. My focus is no longer all about the image. I also stick to "now" more so than what might happen in the future. Dieting causes projection, aka disconnecting from the current self in hopes that the future body will be different. Can it happen? Sure, of course. But at what cost?
I work on that more so than on my eating style, which I have discovered is secondary. Eating should be a simple, instinctive drive, not a mechanized projection of the mind. In other words, I no longer "worry" when/how the next meal arrives. I'll deal with that when the time comes.