Lorcana,
I am a woman working full-time in a very high profile and public industry doing a stressful job. I took 9 months off (using one KIT per month) and within a few months of returning was promoted to take on the top job of its type in my business.
Would I be doing better for my employer or career if I had taken less time off? No. It took six months for the physio to sign me off after my birth. I was also breastfeeding virtual constantly for around seven months. While I kept up bf at night to 16mo, I did not have time to express. My child refused a bottle at daycare and only drunk at night - fine for a 9 month old but impossible for a younger baby.
So I returned when I felt that 9 months off had given me time so I felt I had bonded with my child; my readiness to return to work was obvious to my employer and appreciated; and many people have remarked that my time off has given my focus and ability to delegate better than before.
If you wanted to take off less time for your maternity leaves, that's fine. Just like I think it's fine to take a year if you need or want it.
I would suggest that my employer and I have both won in this scenario.