TBH I agree with you that a year is often too long off if you view it just from a professional viewpoint. I did find it a long time to be gone, and I did have a lot of catching up to do (I work in a fast changing area, and though I had tried to keep on top of major developments, you miss the nuances). Clients had bonded with the colleagues who covered, etc, etc.
But you know what.
Life isn't just about the professional. It's about balancing the professional and the personal.
Legislation does the same thing.
And, for me, a year was the right time to be off. I'm doing it this time too. I wanted to go back to my career, but what was best for my career simply didn't matter to me.