Mute a category should also apply to its sub-categories

Let’s say I have a category A and it has a sub-category B, the level is as below:

  • Category A (outer)
    ----- Category B (inner)

Current behavior is if a user don’t want to see anything in A, he/she needs to mute both A and B to achieve this, but logically why this can not be achieved by just muting A?

Can we have an option to mute one for all its categories?