It always comes back to money. Sorry but teachers get paid.
The government have said its childcare not teachers.
You need to change your title to ‘why are my children’s teachers, not teaching my children’ I don’t know your children, so that’s why I’m not teaching them. To be fair, I don’t know their teachers either, so maybe you’d be better asking them.
Out of interest, why is your redeployment relevant to your question?
I don’t know any schools who aren’t doing the set work, generally in the morning, sports, arts and creative stuff is in the afternoon. Your children’s school, like so many mumsnet schools, is an anomaly.
These children have parents on the frontline, their well-being comes first - this may look like play and crafts, but it’s often more than that.
These threads are super boring now 
Yawns and goes back to online teaching.