Far from being a disadvantage, taking a career break or working PT as a youngster would mean I’m less disadvantaged at a time when I should be being promoted
I know people are trying to be supportive but this goes too far.
To be able to afford two kids before the age of twenty, and then start the sort of a career where there is a career ladder and you can afford child care and wrap around care is very difficult without support from a family or a partner who is high earning.
The likely hood is it would count many people out of the career ladder till about thirty and when wrap around care isn't required. Then it's retraining etc and starting from scratch.
If you want a career it's much better to get on the ladder first, get to a stable state then take a few months materinaty and go back in at the same level and continue to rise.
Of course it can be done, as said, with the right support. But for your average twenty year old, partnered with another twenty odd year old, and no family support either financially or in terms of housing then there is no career advantage because child care is expensive and even at school kids need wrap around care etc.and with two that's serious money.
It's ok to be supportive but let's not pretend it's a land of milk and honey.