G5, that’s great, but it’s pointless to extrapolate that because this is your experience, that all “high earners” are the same. You can only speak for your industry. Many men work away regularly or for long stints. Or they might be entrepreneurs, running various companies and with a host of other non-exec roles and commitments, that mean there is no fixed pattern to how they work, week to week. Most high earners I know work for themselves, but it’s not straightforward and there’s no such thing as “how many hours do you work?” I have no idea how many hours DH works and I never have had because it’s impossible to track and there’s not an obvious cut-off or parameters around his business interests.
Regardless of any of this, some families simply don’t want to “use childcare” if they don’t have to and I guess that is the bottom line.
For normal couples, it can work out absolutely fine to have a mum at home - as long as this us what she actually wants and what the DH prefers too. Both support each other, just in different ways, If you happen to think this set-up is in the best interests of your kids, then this is what you do. Why complicate family life with everyone running around here, there and everywhere if you don’t actually need to?
What does not work - obviously - is situations in which the DH is financially abusive, as is evidently the case here.
But the point is, even if the OP was working, it would still be financial abuse with a DH like this as he would expect her and the children to live on her earnings, even though she was a lower earner.
So either way, this is no way to live. This man is insane and unlikely to change and she needs to get out.