Most employers, be it private or state ones have 0 issues with this setup. 20% less, maybe 15% net income less ain't that huge of a deal - if it is, something ain't right in your finances anyway. What is gained is very well worth it, time with parents is crucial in many ways for small kids and if that window is missed you can't make it up later. Catching up with stuff like bureaucracy which is unavailable during weekends is possible only during such time.
Its true that having kids fundamentally changed my view on wealth and how much should I pursue higher paychecks, life is darn short anyway and double that with kids. I am switching to 90% contract from 1.1.2025 - working usual 5 days a week but having altogether 48.5 MDs of paid vacation (90% of 25MDs I had on 100% + 0.5 MD per each week in year, our HR recipe). It feels like being a teacher but on corporate paycheck (and work intensity). Even with 4 mortgages (for 2 properties) and no family to help financially if we hit hardships, this was a nobrainer. Other aspect would be retiring in 60 (max 61), but that's too far down the line to care much about now.
I am looking very much into spending that time on family and myself. One needs to be happy or at least content with its own life to make others happy too, and thats not achievable easily in rat races. For such benefits alone I don't care about higher paychecks, money only can get you so far in life.