Surely this is the problem - having one adult (usually the female) in a family who stays at home or works p/t school hours enables the other (usually the man) to work long hours, travel etc, progress in their career and have the higher earning potential?
But if you don't have or want that situation and both of you want to work and share household responsibilities and childcare, or want to work part-time or flexibly, your career is not going to progress as you're up against a culture and reality where the long hours and total flexibility enabled by one person SAHM are the norm and because you have other responsibilities that's not possible for you?
If there was more balance in families and more flexibility at work, this would surely benefit everyone and juggling several things would be normal for everyone.
We earn around the same amount, which wouldn't be enough for one of us to give up work or go p/t, even if we wanted to, have a cleaner, share childcare pick up and drops offs, errands and general juggling.
It's do-able as both of us are juggling without the burden falling on one person, though can be stressful at times. Neither of us can take on a job that would involve a lengthy commute, long hours or large amounts of travel at the moment, but we've agreed that and we've both managed to find new opportunities that work for us.