Boeing put out an emergency airworthiness directive after Lion Air. It doesn't tell pilots to lower flaps. AoA sensor failure causes IAS Unreliable warnings, and the checklist for that item demands that flaps be left alone -- if you don't know how fast you're going, lowering flaps could cause a wing stall.

It's not reasonable to expect pilots to disobey checklists. We would all be less safe if they did. If pilots are following Boeing's instructions and planes are crashing, that's on Boeing.