To my own level of understanding, it's not good for husband and wife to be in the same profession. It has many disadvantages for example, If the husband is an Accountant and the wife also an Accountant, they will have not enough time to stay with their children and this may have negative impact on the children.
Let's take for example the case of a husband and wife that are both legal practitioners, and there was a case that involved two of them. The husband was to defend the his client who was charged to the court and wife was the government lawyer. The case almost destroyed their family because they were against each other.
In conclusion, it is not good for husband and wife to be in the same profession because it has many negative effects on their children and their family as a whole.