" I do not permit a woman to teach, or to exercise authority over a man, but to be in silence." -- Paul
Okay, so this means that a sister has to speak to a householder when on the platform, so she isn't addressing us herself and teaching us something. Gotcha. But a sister can give a lengthy comment from her seat, addressing the congregation directly over the mike. Sure, she's basing her comment on the literature, not "teaching", but what else is she doing but summarizing literature when she gives her talk?
And if commenting is permitted, why on Earth can't she do a Bible reading, a talk #1?! It's not teaching, it's reading an assigned passage! Sisters do that from their seats all the time too! And they can certainly do it at the door, even when speaking to a man; I guess those men don't count because they're not "Christians"??? Someone important a few decades back must have had a serious complex about seeing sisters stand up in front of him and speak... or perhaps he was afraid the brothers would be staring lustily at her ankles....