For all posters who find this policy inconvenient and even unnecessary:
If this is a burden for you, not being able to have a life as you cannot make plans, it is usually double or triple the burden for the parents, who have to worry about other siblings, work, possibly being infected, etc.
This is not about you, it is about the wellbeing of the whole community.
This is temporary and will pass.
When and if you think your adult children are not calling you enough, offering enough help, etc. - think of this thread.
If being a parent/child care is hard, it is 3x harder now - for you, the child, the parents, etc.