I agree with you. A test once a year doesn't seem too onerous, and might give you some good information as well.
Common sense requirements are totally foreign to them.
Well, it is D.C., after all. Everyone who enters there seems to leave common sense at the beltway.
Onerous? Not really. The ones we took took a whole Saturday and $60 per child. A decade ago. It can be a considerable expense. Now I think some homeschoolers were permitted to take the assessment that the local schools gave but most of us chose to take a different test that we thought was better (1 day as opposed to 3, and more focused on assessment).
I do have a knee jerk reaction against more regulations but I’m more in favor of once a year or less testing than of anything else.