If you have enough of a guarantee of leading a comfortable life (e.g. you inherit a large fortune), then sure.
But for most people, leaving their professional career is hardly reversible in the long term, and means becoming economically dependent on their partner. Which only works if the couple stays together (and the partner keeps their job).
I hope I can stay together with my partner for life but even if so, I wouldn't be too comfortable if she left her career and became economically dependent: what if I die early, for example? A career is a hedge against adversity.
Even staying together, if a big economic crisis comes, with two jobs it's easier that at least one of us will keep their income than with one.
But for most people, leaving their professional career is hardly reversible in the long term, and means becoming economically dependent on their partner. Which only works if the couple stays together (and the partner keeps their job).
I hope I can stay together with my partner for life but even if so, I wouldn't be too comfortable if she left her career and became economically dependent: what if I die early, for example? A career is a hedge against adversity.
Even staying together, if a big economic crisis comes, with two jobs it's easier that at least one of us will keep their income than with one.