Babysitters don't have to get the kids to DO anything.
Saying these are the same is like saying a manager in a business is only supposed to check if employees showed up and clocked in.
Sure, some managers are that bad at their job, but it is also very clear that their job is supposed to be much more than that.
Same with teachers. Getting 30 children who did not choose to be there to actually DO something is a very different skillset than babysitting.
/rant