'If you are not working and your husband is, regardless of whether he abuses you or if it's your choice or not, he is still dictating how you live your life because your lifestyle is dependant on how much he earns, how hard he works, whether he pushes for promotion, whether he pays in to a pension, whether he has a midlife crisis and decided to leave his job and become a milkman etc etc none of these things are in your control and as such, my gut tells me it is indeed akin to slavery.'
I have to disagree with your gut.
A SAHM can leave at any time. A slave cannot.
A SAHM, if she has the protection of marriage, will have the right to a share of the money earned. A slave will not.
A SAHM has rights over the children. A slave would not.
A slave, in most slave-owning cultures through history, can be beaten and in some cases killed by their master.
At some points in history many or all of these things were also true of married women. They are not now.
Do you not think (since you are a compassionate person) that you are trivialising slavery rather? Or is it fine to insult the suffering of millions of slaves through history and now by making out that it is the same as not being able to force your dp to work towards a promotion, because your gut says it is?