Chesterton's Fence applies to institutional/societal structures with unknown origins, not personal relationships where the history is known to you. The principle encourages understanding before removal, not perpetual inaction when reasons are already clear.
Tread carefully doesn’t mean inaction
Otters defense is that it’s up to their users to inform other participants and get their consent where necessary, the claim of the lawsuit is that Otter is deliberately making a product which does not make it obvious that the call is being recorded, and by default does not send a pre-meeting notice that it will be joining and recording.